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US20110182170 Digital Modulation System Using Modified Orthogonal Codes To Reduce Autocorrelation  
A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of...
US20110019529 INTERFERENCE SUPPRESSION IN UPLINK ACKNOWLEDGEMENT  
The present disclosure proposes design of a pico/femto uplink acknowledgement (ACK) channel that improves the interference suppression for pico/femto base stations. The proposed design provides a...
US20120063293 USING A SINGLE FHT TO DECODE ACCESS-BASED HANDOFF PROBES FROM MULTIPLE USERS  
A method includes scrambling a Walsh sequence with a random sequence to produce a scrambled Walsh sequence. The method also includes transmitting the scrambled Walsh sequence as an access-based...
US20130294218 Method of Allocating Walsh Codes and Quasi-Orthogonal Functional Codes in a CDMA Network  
A method of allocating Walsh codes and Quasi-orthogonal Functional, QoF, codes in a CDMA system in which a finite number of Walsh codes are defined, and some mobile terminals operating in the CDMA...
US20140160916 APPARATUS AND METHOD FOR ALLOCATING CODE RESOURCES TO UPLINK ACK/NACK CHANNELS IN A CELLULAR WIRELESS COMMUNICATION SYSTEM  
A method and apparatus are provided for allocating code resources to ACK/NACK channel indexes, when UEs need ACK/NACK transmission in a wireless communication system in which a predetermined...
US20130044581 APPARATUS AND METHOD FOR ALLOCATING CODE RESOURCES TO UPLINK ACK/NACK CHANNELS IN A CELLULAR WIRELESS COMMUNICATION SYSTEM  
A method and apparatus are provided for allocating code resources to ACK/NACK channel indexes, when UEs need ACK/NACK transmission in a wireless communication system in which a predetermined...
US20100202283 METHOD AND APPARATUS FOR WALSH SPACE ASSIGNMENT IN A COMMUNICATION SYSTEM  
Techniques for Walsh space assignment are disclosed. In one aspect, a list of Walsh functions is maintained in the base station and mobile stations. A Walsh space indicator is transmitted to...
US20080137526 Systems and methods for achieving reduced inter-sector pilot interference in a mobile communication system  
The pilots of a wireless system are arranged to reduce inter-sector interference by establishing a systematic assignment of pilots across the system. In one embodiment, the pilots are differently...
US20060280115 Method of controlling a papr using a walsy code allocation technique in a cdma-2000 system  
There is provided a peak to average power ratio (PAPR) control method which efficiently allocates Walsh codes to channels in a CDMA-2000 (Wideband-CDMA) system. Specifically, the method of the...
US20150245308 METHOD FOR PROVIDING PHASE SYNCHRONIZATION TO NON-PHASE SYNCHRONIZED CELLULAR BASE STATIONS  
The method comprising at least one phase synchronized cellular base station having at least one transmit antenna for transmitting a signal to a at least one non-phase synchronized cellular base...
US20060171296 Apparatus and method for selecting serving sector in a mobile communication system  
An apparatus and method is provided for determining a serving sector using a signal received from a base station. A received signal strength measurer measures a strength of a pilot signal received...
US20100278035 METHOD AND SYSTEM FOR MULTI-USER DETECTION USING TWO-STAGE PROCESSING  
Systems and methods for multi-user detection in a multiple access system are provided. In one aspect, an apparatus is provided. The apparatus comprises a processing unit configured to process...
US20140169151 PHICH Transmission in Time Division Duplex Systems  
A method is provided for communication in a wireless telecommunication system. The method comprises multiplexing, by a network element, at least one symbol of a PHICH onto at least one resource...
US20130301401 PHICH Transmission in Time Division Duplex Systems  
A method is provided for communication in a wireless telecommunication system. The method comprises multiplexing, by a network element, at least one symbol of a PHICH onto at least one resource...
US20070097855 Quasi-orthogonal allocation of codes in TD-CDMA systems  
Systems and methodologies are described that facilitate increasing throughput in a time-division duplexed CDMA wireless communication environment. A set of orthogonal Walsh code sequences can be...
US20080043615 Multi-Rate Wireless Communication Apparatus and Code Distributing Method  
A multi-rate wireless communication apparatus wherein a low complexity is exhibited for a problem of code congestion occurring when a system supports an application of a variable multimedia and...
US20100046357 USING CDMA TO SEND UPLINK SIGNALS IN WLANs  
Methods and apparatus for using code-division multiple access (CDMA) via orthogonal frequency-division multiplexing (OFDM) to convey information from user terminals to an access point (AP) in a...
US20150098313 METHOD FOR DETERMINING THE WALSH-HADAMARD TRANSFORM OF N SAMPLES OF A SIGNAL AND APPARATUS FOR PERFORMING THE SAME  
A computer-implemented method for determining the Walsh-Hadamard transform of N samples of a signal, comprises electing a plurality of hashing C matrices Σ1, . . . ΣC, computing C hashes of a...
US20050007974 Method for identifying walsh code space  
A method of identifying the available Walsh code space. The method includes at least one wireless unit receiving a Walsh code-based signal. The Walsh code-based signal may be transmitted by a base...
US20140153379 CHANNELIZING PACKET ACKNOWLEDGMENTS FOR MULTIPLE DATA CHANNELS IN WIRELESS COMMUNICATION  
Acknowledgments for packets received on multiple data channels in wireless communication are channelized with multiple orthogonal codes to generate multiple symbol sequences. Modulation symbols...
US20080080432 Carrying Mobile Station Specific Information in the Reverse Access Channel in a Wireless Communications System  
Two types of access probe messages are defined: a first when a mobile station has not yet been assigned a media access code index (MAC ID), and a second when a mobile station already has a MAC ID...
US20120014244 BASE STATION, MOBILE STATION, PILOT TRANSMISSION METHOD, AND CHANNEL ESTIMATION METHOD  
Disclosed are a base station, a mobile station, a pilot transmission method, and a channel estimation method, whereby excellent zone interference blocking characteristics can be obtained and high...
US20080291820 Method for Allocating Frequency Domain Spread Code in Base Station of Mc-Cdma Communication System  
The present invention relates to a method for allocating a frequency domain spread code in a base station of a multi-carrier code division multiple access (MC-CDMA) communication system. A code...
US20050185698 Spread spectrum acquisition  
To receive a spread spectrum signal without access to the timing information of the transmitter, it is necessary to synchronise timing at the receiver. Assuming each symbol is represented by n...
US20080181096 USING A SINGLE FHT TO DECODE ACCESS-BASED HANDOFF PROBES FROM MULTIPLE USERS  
Aspects describe a Fast Hadamard Transform that is common to multiple mobile devices. A scrambled sequence produced by the Fast Hadamard Transform can be utilized to decode access-based handoff...
US20050117508 Method and apparatus for acknowledging reverse link transmissions in a communications system  
A method and apparatus for acknowledging reverse link transmissions in a communications system. An information bit is set and then repeated. The repeated information bit is covered with a code...
US20060274640 Methods and systems for efficient conveyance of bandclass information in wireless networks  
Systems and methods are presented for efficiently conveying bandclass information between switching modules in a wireless communications system to facilitate call delivery or call origination. A...
US20120269052 SHARED CHANNEL STRUCTURE, ARQ SYSTEMS AND METHODS  
A wireless terminal adapted to function in a code division multiple access (CDMA) communications system is provided. The terminal includes a receiver adapted to receive frames having a slot...
US20060203713 Efficient signal transmission methods and apparatus using a shared transmission resource  
A device includes a zero symbol rate (ZSR) coding/modulation module and a second type coding/modulation module. Both modules generate modulation symbols to be conveyed using the same air link...
US20120287770 WIRELESS COMMUNICATION TERMINAL APPARATUS, WIRELESS COMMUNICATION BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD  
Provided are a wireless communication terminal apparatus, a radio communication base station apparatus and a wireless communication method whereby the increase in the number of signaling bits can...
US20110110219 METHOD AND SYSTEM FOR BALANCING REFERENCE SIGNAL POWERS ACROSS OFDM SYMBOLS  
A base station includes a reference signal allocator that allocates a first layer of dedicated reference signals and a second layer of reference signals to the same resource elements in a first...
US20070104088 Method and apparatus for improved short preamble formats in a multiple antenna communication system  
Methods and apparatus are provided for improved short preamble formats in a multiple antenna communication system having N antennas. A short preamble format having a legacy portion and a high...
US20140140193 Wireless Terminal Apparatus and Wireless Base Station Apparatus  
Both a wireless terminal apparatus and wireless base station apparatus are provided that can, in an operation of encoding the control signals of the upstream link transmitted from the multiple...
US20130070580 APPARATUS AND METHOD FOR ORTHOGONAL COVER CODE (OCC) GENERATION, AND APPARATUS AND METHOD FOR OCC MAPPING  
An apparatus and method for Orthogonal Cover Code (OCC) generation, and OCC mapping, includes generating the first group of OCC sequences, which is used to generate the first group of OCC...
US20100278034 Efficient signal transmission methods and apparatus using a shared transmission resource  
A device includes a zero symbol rate (ZSR) coding/modulation module and a second type coding/modulation module. Both modules generate modulation symbols to be conveyed using the same air link...
US20100296384 WIRELESS COMMUNICATION APPARATUS AND RESPONSE SIGNAL SPREADING METHOD  
A wireless communication apparatus capable of minimizing the degradation in separation characteristic of a code multiplexed response signal. In this apparatus, a control part (209) controls both a...
US20080232239 Method and Apparatus for Communicating Orthogonal Pilot Tones in a Multiple Antenna Communication System  
Methods and apparatus are provided for communicating pseudo-orthogonal pilot tones in a multiple antenna communication system. Data is transmitted in a multiple antenna communication system having...
US20070104089 Method and apparatus for improved long preamble formats in a multiple antenna communication system  
Methods and apparatus are provided for improved long preamble formats in a multiple antenna communication system having N antennas. According to one aspect of the invention, a preamble having a...
US20130039164 WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD  
A wireless communication apparatus of the invention has a determination section that determines which one of a plurality of formats is used for determining transmission symbols to be transmitted...
US20070110021 Method and system for directing a call for a mobile station to a band class in a wireless communication network  
Methods and systems for directing a call for a mobile station (MS) (400) to a band class in a wireless communication network (100) are provided. The wireless communication network includes a...
US20070091788 Versatile data rate control for enhanced EVDO systems  
A system for providing parallel, concurrent transmission of multiple DRC elements is disclosed. An assignment element assigns, for each access terminal in an access network, two DRC-related...
US20110075708 METHOD AND SYSTEM FOR PER-CELL INTERFERENCE ESTIMATION FOR INTERFERENCE SUPPRESSION  
A wireless system may receive a plurality of multipath signals from a plurality of transmitters and allocate per-cell modules for generating an interference suppressed signal from the multipath...
US20060133262 Control channel assignment in a wireless communication network  
The disclosed embodiments provide for methods and systems for allocating a plurality of users on a control channel in a wireless communication network. In one aspect, a method for allocating a...
US20130223850 MODULATION METHOD AND APPARATUS FOR AMPLITUDE- OR INTENSITY-MODULATED COMMUNICATION SYSTEMS  
The present invention relates to a method for determining a signaling set, comprising: selecting a first basis function in the form of a symmetric pulse represented by an even function; selecting...
US20080212462 Apparatus for Generating Down Link Signal, and Method and Apparatus for Cell Search in Cellular System  
A method for generating a downlink signal and searching for a cell from the downlink signal in an OFDM-based cellular system is provided. Thus, a pilot pattern is formed in the downlink signal,...
US20120082023 CODE MULTIPLEXING TRANSMISSION METHOD, TRANSMISSION APPARATUS AND RECEPTION APPARATUS  
To obtain a high frequency diversity effect while suppressing inter-code interference in code multiplexing transmission in an OFDM-based radio access scheme, a transmission apparatus is provided...
US20080043859 System and Method for Applying Frequency Domain Spreading to Multi-Carrier Communications Signals  
A system and device communicates data. A modulation and mapping circuit modulates and maps data symbols into a plurality of multiple subcarriers that are orthogonal to each other based on a fixed...
US20070077955 Techniques to transmit data rate control signals for multi-carrier wireless systems  
Various embodiments are disclosed relating to techniques to transmit data rate control signals for multicarrier wireless systems. According to an example embodiment, a wireless apparatus may be...
US20070211620 METHOD AND APPARATUS FOR SCHEDULING AN ACKNOWLEDGEMENT TRANSMISSION  
A communication system distributes, in the time domain, acknowledgment transmissions by a group of access terminals sharing a same time domain resource. A position of one or more access terminals...
US20070211619 METHOD AND APPARATUS FOR HYBRID CDM OFDMA WIRELESS TRANSMISSION  
A method and apparatus for wireless transmission from a mobile unit to a base station includes multiplexing a pilot signal and a data signal, wherein the data signal operates at a data rate by...

Matches 1 - 50 out of 72 1 2 >