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7545731 |
Virtual buffer size management system for the transmission of blocks of data bits in an HS-DSCH downlink channel of a mobile communications network
A first rate matching stage matches a number of input bits coming from a transport channel including a high-speed downlink shared channel (HS-DSCH) of a block of data bits to be transmitted from a...
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7542726 |
Methods and apparatuses for detecting the TX diversity mode for mobile radio receivers
In a method and an apparatus ( 1 ) for transmission diversity mode detection in a mobile radio receiver using a decision function, the decision function which is used for detection of the...
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7539122 |
Device and method for management of the transmission of blocks of data in an HS-DSCH downlink channel of a mobile communications network
A device (D) is dedicated to managing transmission of digital data blocks in High-Speed Downlink Shared Channel (HS-DSCH) downlink transport channel set up between a base station of a...
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7471671 |
Band signal detection and presentation for IP phone
A VoIP telephone operates in an IP environment wherein at least a portion of the signaling from a remote gateway is included within a media session real time protocol stream. The VoIP telephone...
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7461317 |
System and method for aligning a quadrature encoder and establishing a decoder processing speed
A system and method are disclosed for determining the minimum required processing speed for a quadrature decoder using measurements of encoder performance, and to assess the safety factor of a...
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7447145 |
Data communication device selecting modulation method with an appropriate threshold value in adaptive modulation
There is provided a digital communication device for performing data communication by selecting an appropriate modulation encoding method. Quality measurement means measures the line quality of...
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7443921 |
Mobile body communication apparatus
When communications of the same data are performed using a multi-carrier modulation method between a plurality of base stations and a mobile station at the same time and with the same frequency, a...
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7386052 |
Automation device using FSK modulation
The invention relates to an automation device, with which a multiplicity of physically distributed functional units communicate with each other by means of a common transmission protocol. The...
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7376114 |
Code multiplexing transmitting apparatus
A code multiplexing transmitting apparatus spread-spectrum modulates transmission data of a plurality of channels by spreading codes that differ from one another, combines the spread-spectrum...
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7298717 |
Method and apparatus for providing transmit diversity with adaptive basis
A method and apparatus are provided that uses the feedback information from an ARQ signal that is received to control the transmit diversity of a transmitter. The method provides for improved...
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7283011 |
Method for performing dual phase pulse modulation
A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high...
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7239431 |
System and method for recovering primary channel operation in a facsimile receiver and facsimile machine incorporating the same
A system for, and method of recovering primary channel operation in a facsimile (fax) receiver and a fax machine that incorporates the system, the method or both. In one embodiment, the system...
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7085327 |
Phasor fragmentation circuitry and method for processing modulated signals having non-constant envelopes
An improvement for a phasor fragmentation engine and method, whereby a phasor flipping algorithm is applied when determining fragment phasors for a non-constant envelope modulation signal (e.g....
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7016425 |
Quasi-differential modulation/demodulation method for multi-amplitude digital modulated signals and OFDM system
The invention proposes the separate processing of the phase and amplitude of multi-amplitude digital modulation techniques, such as a QAM. The phases are differentially modulated and the amplitudes...
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7013129 |
Queuing for radio channel availability
Apparatus and a method for establishing a cellular mobile call. If no radio traffic (voice or data) channels are available for a calling Mobile Station (MS), then a test is made to determine the...
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6999407 |
Speed negotiation device and method
A device and method for data rate selection in data transmission is provided, having a first register for storing an N bit data upon clocking by a first clock; a second at least one register for...
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6922438 |
System for MPSK symbol hypothesis testing
A system for MPSK symbol hypothesis testing. A received symbol having in-phase (I) and quadrature (Q) components is input to the system. Multipliers for each of the components are determined...
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6856590 |
OFDM transmission device and OFDM transmission method
The time required for switch the channel can be remarkably curtailed. When broadcasting signals through a plurality of information channels with an OFDM system, the plurality of information...
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6845083 |
Multi-standard transmitter system and method for a wireless communication system
A transmitter 108 converts a digital baseband signal input 150 for transmission by an antenna 114 to support multiple communication standards. An over-deviation phase multiplier 130 ...
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6687356 |
System and method for providing device-aware services in an integrated telecommunications network
A system and method of device-aware service provisioning in a hybrid/integrated telecommunications network having a packet-switched network portion (PSN) and heterogeneous circuit-switched network...
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6675306 |
Method and apparatus for phase-lock in a field programmable gate array (FPGA)
An apparatus for performing phase-lock in a field programmable gate array includes a phase detector configured to determine a phase difference between a carry logic oscillator signal and a...
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6470055 |
Spectrally efficient FQPSK, FGMSK, and FQAM for enhanced performance CDMA, TDMA, GSM, OFDN, and other systems
Spectral efficient transmitters-receivers (transceivers), modulation-demodulation (Modem) methods, architectures, structures and implementation technologies for enhanced performance and increased...
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6445746 |
IS-136&plus slot formation
A system and method for demodulating slots having a mixed slot formation including differential and coherently encoded slots is disclosed. The method includes pre-phase encoding data and a...
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6445745 |
Phase encoding methods for handling multiple phase modulated signals on a single channel
A method for phase encoding DPSK and N-PSK which maintains phase continuity and which does not require any reference symbols when using N-PSK. A sequence of known DPSK phases are encoded with...
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6373817 |
Chase me system
A chase me method of routing a variable bit rate communication between a first terminal and a distant terminal over alternative networks including a circuit switched network and a packet network...
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6314369 |
Communications navigation system, and navigation base apparatus and navigation apparatus both used in the navigation system
In a communications navigation system, data is transmitted and received between a navigation base apparatus provided at a navigation base and each of a plurality of navigation apparatuses provided...
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6295273 |
Phase modulation multiplexing transmission unit and phase modulation multiplexing method
In the phase modulation multiplexing transmission unit of FIG. 2, a digital input signal is divided by a signal division unit 1, each of the resultant division signals is output to multiplication...
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6157612 |
Fast fading packet diversity transmission method and system
The present invention is a fast fading packet diversity transmission method and system for reducing the effects of multipath fading on slow fading channels. One embodiment of the present invention...
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5978421 |
Envelope control unit and digital modulator using the envelope control unit and digital modulation method
A power component of a transmission modulated wave generated by synthesizing a plurality of digital-modulated multi-carriers is calculated. Then, the envelope control unit of the present invention...
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5929921 |
Video and audio signal multiplex sending apparatus, receiving apparatus and transmitting apparatus
The present invention provides a video and audio signal multiplex transmitting apparatus having a video and audio signal multiplex sending apparatus for grouping audio data to packets of a fixed...
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5805574 |
Adaptive switch resource allocation in a satellite communication system
A telecommunication network (10) includes satellites (12) in which cellular base station switches (42) are located. Each switch (42) is hardware configured to require the use of relatively few...
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5561660 |
Offset and phase correction for delta-sigma modulators
The present invention discloses method and apparatus for offset and phase correction in multiplexed delta-sigma modulators. According to the invention, offsets and phases of input signals to...
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5465267 |
Error-correcting tandem encoding system
An error-correcting tandem encoding system includes a transmitter section and a receiver section. The transmitter section comprises a multiplexer for multiplexing data and voice signals supplied...
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5428600 |
Method and devices for transmitting data, particularly by satellite
A relay satellite receives, from stations on the ground, modulated high-frequency signals situated in two different frequency bands. One of the modulations is narrow band and the other broad band....
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5390167 |
Code-division multiplex communication apparatus
A code-division multiplex communication apparatus for carrying out multiplex communication by using pseudo noise (PN) codes and an application system thereof are provided, which have high SN ratio...
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5126998 |
Method and apparatus for transmitting and receiving a carrier signal which is simultaneously frequency and phase modulated
A method and apparatus for transmitting and receiving a carrier signal which is simultaneously frequency and phase modulated, including a carrier signal, a frequency modulator for imposing on the...
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4852081 |
Echo suppressor with adaptive digital filter for transmission system
An adaptive echo suppressor is provided at each local station in a data transmission system for transmission of local data from a local station to a remote station over a transmission medium...
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4769816 |
Qpsk demodulator
A receiver including two optimizers for demodulation, sampling and quantization of received QPSK digital data. One optimizer adjusts the phase of a reference signal used for demodulating the QPSK...
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4761798 |
Baseband phase modulator apparatus employing digital techniques
There is disclosed a Zero IF modulator apparatus for modulating carrier signals with baseband signals, the modulator includes digital logic circuitry including a sine/cosine amplitude converter...
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4755773 |
Phase modulator apparatus for generating a burst phase-modulated wave
A time division communication system tends to develop noise responsive to variations of the output of the voltage supply which occur as the time slot signals switch on or off to thereby vary the...
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4715047 |
Digital differential phase shift keyed demodulator
A differential phase shift keyed demodulator for demodulating a differential phase shift key modulated signal and synchronizing the clock thereof. To accomplish the demodulation, the differential...
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4688218 |
Multiplex channels for continuous flow for numerical signal
A digital data pack transmission system is especially--but not exclusiveluseful in videotex or teletext transmission (i.e. videotext or teletext data is transmitted during intervals between...
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4670887 |
Multiplexed PSK demodulator
An improved quadrature differential phase shift keyed signal demodulator for use in a modem is shown. A delay circuit (12) delays an input signal for a portion of a baud time. Synchronous detectors...
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4652838 |
Phase randomization to reduce detectability of phase or frequency-modulated digital signals
A communications system for conveying information angle-modulated onto a carrier includes a modulator which angle-modulates the data onto the carrier and which also randomly changes the phase of...
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4523311 |
Simultaneous transmission of speech and data over an analog channel
The present invention relates to a technique for recovering each of an entire analog speech signal and a modulated data signal simultaneously received over a transmission channel such as a common...
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4512013 |
Simultaneous transmission of speech and data over an analog channel
The present invention relates to a technique for transmitting an entire analog speech signal and a modulated data signal over a transmission channel such as a common analog telephone speech...
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4499600 |
Supervision of transmission systems
In a repeater for a communication system a continuously running local oscillator (P) injects a pilot tone into the repeater input, ahead of all the non-linear functions. The repeater may include an...
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4414662 |
System for the transmission of digital data in packets
A system for the transmission of digital data in packets comprising transmission and reception means, wherein: the transmission means are able to form single words taken in a group of words each...
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4393279 |
Digital data transmission system having frequency or phase modulated data carrying signals to provide supervisory channel
A supervisory channel is provided on a digital transmission system by frequency modulation of the data signal transmitted along a transmission link which includes repeaters. The frequency...
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4285062 |
Digital multi-level multi-phase modulation communication system
A digital multi-level multi-phase modulation system utilizes quaternary differential encoding and decoding of only the first two of N digital signal trains. A decision circuit is used to examine...
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