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7609752 |
Transmitter and transmission control method used in random access communication environment
A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement...
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7609751 |
Method and apparatus to initiate communications between an unknown node and an existing secure network
A first node initiating communications with a second node already in a secure network sends a discovery burst having a preamble portion and a payload portion. The preamble portion is sent at a...
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7606567 |
Channel allocation for burst transmission to a diversity of satellites
A method for allocating transmission channels to devices configured to communicate short data packets to a diversity of non geostationary satellites is disclosed hereby. The method suggests a...
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7602835 |
Multi-rate spread spectrum composite code
A correlator despreads a P/N long code constructed from two or more constituent codes A, B, C having N, M and L elements respectively. In a third stage, L filter taps decorrelate elements of the...
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7599421 |
Spread spectrum applications of universal frequency translation
Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified...
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7599309 |
Method and apparatus for managing cell-by-cell demodulation timings of a user equipment in an asynchronous mobile telecommunication system
A method and an apparatus are provided for managing cell-by-cell demodulation timing of an asynchronous user equipment (UE) for demodulating multipath signals, received from a plurality of cells,...
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7596170 |
Coherent detection without transmission preamble
A receiving system allows for the coherent detection of a spread-spectrum transmission at any point in time during the transmission, thereby avoiding the need to identify the start of the...
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7596105 |
User equipment for synchronizing to a TDD base station
A time division duplex (TDD) user equipment (UE) is configured to synchronize to a TDD base station. The UE includes a receiver configured to receive a primary synchronization code along with a...
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7593453 |
Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
A spread spectrum signal having an associated code is tracked at a receiver. A plurality of components of the spread spectrum signal are despread using the associated code. Each of the plurality of...
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7593371 |
Radio communication system and base station employing CDMA
A base station controller selects codes corresponding to rate information included in a new starting call message from a mobile station, and further selects codes assignable to the mobile station...
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7583737 |
OFDM signal receiver device and OFDM signal receiving method
The present invention relates to a OFDM signal receiver device that performs weighting for branch metrics based on average noise power or signal-to-noise power ratio and conducts Viterbi decoding...
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7580475 |
Base station having a set of phased array antennas
A spread spectrum base station for receiving a plurality of spread spectrum signals and a plurality of phased spread spectrum signals includes an antenna and a plurality of delay devices connected...
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7580466 |
Demodulation device and demodulation method
The present invention relates to a demodulation device and a demodulation method, and its object is to demodulate subcarrier components utilizing estimated delay profiles to control the timing for...
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7570684 |
Method for joint time synchronization and frequency offset estimation in OFDM system and apparatus of the same
Embodiments of the present invention include a method for performing joint time synchronization and carrier frequency offset estimation in a wireless communication system, comprising steps of: on a...
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7568058 |
Rate matching apparatus, systems, and methods
An apparatus and a system, as well as a method and article, may operate to include repeating first data to provide first repeated data and deleting second repeated data to provide second data...
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7564905 |
System and method for providing terrestrial digital broadcasting service using single frequency network
Provided is a system and method for terrestrial digital broadcasting service using a single frequency network without additional equipment. The system and method synchronizes input signals into...
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7564774 |
Communication network using code division multiplexing technology
A communication network which can use communication bandwidth effectively. Spreading codes of a first and a second code length are assigned for every communication terminal interfaces connected to...
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7545895 |
High performance W-CDMA slot synchronisation for initial cell search with reduced hardware
Two preferred embodiments provide slot synchronization of an initial cell search. Two Finite Impulse Response (FIR) filters are used to correlate the synchronization codes transmitted in the...
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7545848 |
High resolution time stamps for periodic samples
A method and apparatus for collecting digital sample data from a target system accesses the digital sample data at transitions of a sample clock, acquires information related to an instantaneous...
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7539239 |
Apparatus for rapid PN code acquisition
An apparatus and method of determining a signal code. The method comprising steps of acquiring and correlating a signal with a first code sequence. In response to the timing lock is achieved. Also...
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7536014 |
Apparatus and method for generating scrambling code in UMTS mobile communication system
A scrambling code generating apparatus of a downlink transmitter in a UMTS mobile communication system, which uses one primary scrambling code for separation of base stations and multiple secondary...
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7535983 |
Method for identifying the beginning of a UWB pulse sequence
A method for transmitting data in the form of pulse sequences, including a signal synchronization step carried out by a receiver of dataframes DF, in the course of which at least one time window...
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7529291 |
Methods and structures for rapid code acquisition in spread spectrum communications
Methods and structure for improved speed in pseudo-noise code acquisition. A receiver may include features to evaluate multiple potential pseudo-noise (PN) digital code sequences in parallel to...
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7529264 |
Use of orthogonal or near orthogonal codes in reverse link
A technique for allowing a first and second group of users to share access to a communication channel such as a wireless radio channel is disclosed. The first group of users can be a group of...
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7526010 |
Doped multi-rate spread spectrum composite code
A composite code is made for example by exclusive-OR'ing each real element of a first constituent code A with each element of a second constituent code B to obtain a basic composite code. To...
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7508860 |
Pulse signal generator for ultra-wideband radio transception and radio transceiver having the same
Provided are a pulse signal generator for UWB radio transception and a radio transceiver having the same. The pulse signal generator includes: an envelope generator generating a plurality of...
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7492810 |
Method and apparatus for segmented code correlation
A method and an apparatus is disclosed for efficient cross correlation of a plurality of signal vectors. Incoming data is partitioned into several segments and processed according to an algorithm...
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7489755 |
Method and apparatus for transmission and reception of data
Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator ( 110 )...
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7483473 |
Access channel structure for wireless communication system
A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or...
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7480266 |
Interference adaptation apparatus, systems, and methods
Apparatus and systems, as well as methods and articles, may operate to detect radio-frequency energy at a frequency associated with at least one wireless networking channel and to transmit a data...
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7477680 |
De-spreader operative with selectable operational clock for spread spectrum communication and a method for the same
A de-spreading device for a spread spectrum communication system includes a first and a second correlator assigned to a regular and a power-saving operation mode, respectively. The first correlator...
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7471932 |
System and method for embedding OFDM in CDMA systems
Systems and methods of combining OFDM and CDMA signals are provided. An OFDM packet data channel is overlaid over CDMA transmissions. The channel is scheduled slotwise between multiple users. In...
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7471754 |
Method and device for fine synchronization of a digital telecommunication receiver
A method for the synchronization of a digital telecommunication receiver comprises the steps of:—storing a plurality of consecutive samples E−1, E, M, L, L+1 of an incoming spread spectrum...
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7453920 |
Code synchronization in CDMA satellite wireless communications system using uplink channel detection
An uplink signal transmitted by a terminal is received by a satellite wireless communications system. The uplink signal includes a known information element, e.g., a reverse access channel (R-ACH)...
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7447253 |
Method and apparatus for processing satellite positioning system signals to obtain time information
A method and apparatus for processing satellite positioning system signals at a mobile receiver is described. In one example, first bit-transitions within satellite navigation data transmitted by...
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7437177 |
Method employed by a base station for controlling initial power ramp-up using short codes
A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a...
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7426391 |
Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system
Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each...
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7423577 |
System and method for transmitting high data rate information from a radar system
A system and method for transmitting high data rate information from a pulsed radar is disclosed. The method includes collecting information using a mobile radar platform. The information is...
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7412014 |
Timing-adjusting method and apparatus, and diversity receiving method and apparatus
An A-D conversion unit performs analog-to-digital conversions on baseband signals. A correlation processing unit carries out a correlation processing. A power computing unit computes the power of...
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7403507 |
System and method for recovering system time in direct sequence spread spectrum communications
A sleep control system and method are provided that permit a reference clock and the direct sequence spread spectrum (DSSS) modem in a mobile station receiver to be turned off and turned back on at...
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7400654 |
Method for synchronizing a receiver with a transmitter
A method is provided for synchronizing a receiver with a transmitter, wherein a first synchronization signal with a multiplicity of second synchronization signals is transmitted from the...
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7388899 |
Spreading code structure for ultra wide band communications
The ultra wide band communication system of the present invention includes a transmitter (station) and a receiver (station). The transmitter and the receiver employ spreading code comprised of code...
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7386035 |
Method of compensating for energy loss and eliminating inter-symbol interference and inter-chip interference and rake receiver for WLAN adopting the same
Provided is a method of compensating for energy loss and eliminating inter-symbol interference (ISI) and inter-chip interference (ISI) in wireless signals, and a rake receiver for wireless LANs...
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7386026 |
Method and system for synchronizing and selectively addressing multiple receivers in a wireless, spread spectrum communication system
A system and method for synchronizing and selectively addressing multiple receivers in a wireless communication system includes a spread spectrum transmitter and one or more spread spectrum...
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7379748 |
Method for speeding up synchronization by having a search frequency list comprising a limited number of search frequencies
A method for initial synchronization in a mobile telecommunications network to connect a mobile terminal ( 10 ) to a base station ( 12 ). The mobile terminal has a search frequency list comprising...
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7372926 |
Radio receiver apparatus
In order to perform diversity reception efficiently without increasing the scale of the apparatus, when the total number of simultaneously connected cells has reached N cells including an HSDPA...
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7366228 |
Synchronization detecting apparatus
In a channel estimating circuit, a Sync Word is demodulated by using a channel estimation value not with a symbol or a slot including the Sync Word to be demodulated, but with its preceding and...
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7366141 |
Cell search method and apparatus in a WCDMA system
A cell search method for use in a mobile communication system, the method including: performing one or more identification steps for identifying timing and codes of oversampled input signals; and...
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7356094 |
Digital broadcast receiving apparatus
A digital broadcast receiving apparatus for receiving a broadcast signal generated by combining sub signals modulated using a random sequence generated based on an initial value set in accordance...
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7336635 |
Method and apparatus for fast W-CDMA acquisition
Apparatus for classifying a ray is disclosed, wherein the ray is received at a code division multiple access receiver. The apparatus comprises: means for receiving a neighbouring cell list...
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