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7602852 Initial parameter estimation in OFDM systems  
A coarse estimate of a location of an information carrying part of a symbol in a received signal in a telecommunication system is generated. This involves generating correlation values by...
7599332 Modified preamble structure for IEEE 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, MIMO or otherwise extended devices  
A modified preamble is used by extended devices that operate at higher rates, MIMO or other extensions relative to strict 802.11a-compliant devices. The extended devices might use multiple antenna...
7596801 Single wire return device in a fiber to the home system  
Systems and methods are disclosed for providing reverse signals from a plurality of DHCTs to a downstream modulator that is located in the headend facility. The present invention includes a single...
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...
7590202 Reduced-complexity antenna system using multiplexed receive chain processing  
A method and associated system for processing a plurality of replicas of a signal in a signal processing chain, the method includes receiving each of the plurality of replicas of the signal at one...
7583738 Apparatus and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing communication system  
Provided is a method for reducing a PAPR (Peak-to-Average Power Ratio) of a transmit signal in a broadband wireless communication. The method includes the steps of: assigning information signals to...
7583584 System and method for time diversity  
A system and method for time diversity uses interleaving. To simplify the operation at both transmitters and receivers, a formula can be used to determine the mapping from slot to interlace at a...
7580487 Apparatus and method for estimating a carrier to interference and noise ratio in a communication system  
An apparatus and a method for estimating a carrier to interference and noise ratio (CINR) in a communication system. The CINR value is precisely estimated by removing the error floor value, which...
7580484 Orthogonal frequency division multiplexing (OFDM) demodulator, integrated circuit for OFDM demodulation and OFDM demodulation method  
An Orthogonal Frequency Division Multiplexing (OFDM) demodulator, an integrated circuit for OFDM demodulation and an OFDM demodulation method in which at least one of a predictive value generated...
7577216 Guard interval and FFT mode detector in DVB-T receiver  
For determining FFT and GI (guard interval) modes within a receiver, a correlation signal is generated from an in-phase and quadrature (I/Q) stream. An plurality of GI mode division signals are...
7577087 Faster fine timing operation in multi-carrier system  
There is provided a method, system and receiver for receiving data over a communication link. An energy of said signal in respect of an estimated guard interval position of said signal is defined....
7577085 Multicarrier transmit diversity  
Method, apparatus, and data packet format to implement transmit diversity in a multicarrier environment is disclosed. For diversity transmission operations, space frequency encoding techniques are...
7573860 Method, device and system for determining a transmission power for ARQ related re-transmissions  
The present invention provides a method, a mobile terminal device and a system for determining a transmission power factor. During an uplink of data between a mobile terminal device and a base...
7570748 Control and monitoring telecommunication system and method of setting a modulation method  
Using a network in which one master station modem 105 and multiple slave station modem 106, 107, 108 are physically connected by rudder connection or bus connection with a telecommunication...
7570578 Orthogonal frequency division demodulator, method and computer program product  
An OFDM demodulator that demodulates an OFDM signal includes an antenna that receives a signal including delayed signals, an estimation circuit that estimates the channel response of the received...
7564908 Method and apparatus for encryption of over-the-air communications in a wireless communication system  
A communication device converts a bit stream to multiple symbols and provides encryption at a physical layer by shifting a phase of each symbol of the multiple symbols to produce multiple encrypted...
7561626 Method and system for channel estimation in a data transmission system  
Improved techniques for estimating a channel (e.g., channel impulse response) in the time domain are disclosed. The improved techniques can be used to estimate time-domain channel taps in a digital...
7551545 Subband-based demodulation for an OFDM-based communication system  
For subband-based OFDM demodulation, a “partial” Fourier transform is performed on a sequence of N input samples for an OFDM symbol to obtain N c received symbols for a group of N c data...
7545732 Apparatus and method for assigning sub-carriers in an orthogonal frequency division multiplex system  
An apparatus and method for assigning sub-carriers in an orthogonal frequency division multiplex (OFDM) system are disclosed. In the apparatus and method, data is transmitted through at least one...
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...
7542409 Logical and operation diversity combining method  
A method for processing signals received in a communications system determines symbol information corresponding to a re-transmitted packet, compared the symbol information of the re-transmitted...
7542408 Method of reducing inter-subcarrier interference in multicarrier communication systems and receiver using it  
A receiver of a multicarrier communication system capable of reducing inter-subcarrier interfering signals is to be provided. Receive signals received by a receiving antenna are amplified by a...
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...
7535874 Method and apparatus for adaptive power control for spread-spectrum communications  
A code division multiple access subscriber unit comprises an antenna configured to output a radio frequency signal, the radio frequency signal having a quadrature (Q) channel and an in-phase (I)...
7535822 Synchronization of remote units for a communication network  
A method for maintaining the quality of transmission from a head end to a service unit in a telecommunications system that uses a multi-carrier transmission scheme with dynamic bandwidth allocation...
7505396 Method and apparatus for establishing interleaver synchronization in an orthogonal frequency division multiplexing (OFDM) communication system  
Interleaving methods and apparatus are disclosed for an in-band on-channel digital audio broadcasting system. The guard periods that separate any two adjacent symbols in a conventional OFDM system...
7499392 OFDM equalizer filter with shared multiplier  
An apparatus for OFDM communications includes an equalizer filter configured to receive input data and to apply a tap setting to the input data to generate output data. The input data includes a...
7496335 Mobile terminal apparatus and channel compensation method of the same  
A mobile terminal apparatus includes a channel compensation processor configured to carry out a channel compensation process on a first channel reception signal using a channel estimation value...
7489731 Communication system using OFDM  
The OFDM communications system for wireless networks includes at least one transmitter and at least one receiver. Each transmitter includes a signal source, a transmit modulator that arranges the...
7489621 Adaptive puncturing technique for multicarrier systems  
Various embodiments are described for adaptive puncturing techniques involving an adaptive bit loading block to select a modulation scheme and a puncturing pattern for each of a plurality of...
7486738 Apparatus and method for reducing the crest factor of single carrier or multi-carrier signals  
An apparatus for reducing the crest factor of a multi-carrier transmission system. The apparatus comprises a plurality of single carrier crest factor reduction circuits. Each of the single carrier...
7486735 Sub-carrier allocation for OFDM  
The present invention divides the available sub-carriers in an OFDM symbol window into N groups of sub-carriers wherein each group will be associated with sub-bands. In one embodiment, the...
7483365 Process for obtaining notches in the transmission of signals over the electricity network  
This permits the transmission of signals over the electricity network in such a way that the spectral density of power is adjusted to the regulations in the current rules by means of the...
7480236 Multipoint-to-point communication using orthgonal frequency division multiplexing and identification codes  
Systems for multipoint-to-point communication using orthogonal frequency division multiplexing and identification codes are provided. In one embodiment, a system comprises: a host unit; and a...
7474611 Reduced complexity channel estimation in OFDM systems  
A channel response estimate is generated from a received signal that comprises two or more different pilot carriers in an Orthogonal Frequency Division Multiplexing (OFDM) communications system....
7460465 Method for reducing signaling overhead in a multicarrier system with dynamic bit allocation and corresponding transmitter/receiver device  
A method for reducing signaling overhead in a multicarrier system with dynamic bit allocation per subcarrier and a corresponding transmitter/receiver device, are provided wherein an established bit...
7450542 Method for frequency division duplex communications  
The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the system's operation. The...
7433382 Spread spectrum based multichannel modulation for ultra wideband communications  
A spread spectrum based multichannel modulation Ultra-Wideband (UWB) communication transceiver for indoor wireless operations is presented according to some embodiments. The spread spectrum based...
7433298 Compensation for residual frequency offset, phase noise and I/Q imbalance in OFDM modulated communications  
Signal processing methods and apparatus which incorporate I/Q imbalance compensation based on most likely estimates of the I/Q imbalance between the I and Q components of a baseband signal are...
7426246 Dual layer signal processing in a layered modulation digital signal system  
Systems and methods for receiving layered modulation for digital signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase...
7426243 Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers  
Systems and methods for receiving non-coherent layered modulation signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase...
7426177 Round trip delay adjustment in multipoint-to-point communication using orthogonal frequency division multiplexing  
Systems and methods for bidirectional communication are provided. In one embodiment, a method for aligning communications from a plurality of remote units in a multipoint-to-point orthogonal...
7426176 Method of power allocation and rate control in OFDMA systems  
A method of data communication. The method includes initially receiving one or more channel quality information signals from each wireless unit. The channel quality information may be received in...
7424073 Orthogonal frequency division multiplexing (OFDM) receiver, OFDM receiving circuit and OFDM diversity reception method  
An Orthogonal Frequency Division Multiplexing (OFDM) signal having a symbol defining a transmission unit is produced by dividing data streams into a plurality of carriers within a predetermined...
7423958 Transmitter for transmitting signals over radio channels and method for transmitting signals over radio channels  
A transmitter for sending signals over wireless channels and a method of sending signals over wireless channels are described. The transmitter and the method are used to determine a transfer...
7418049 Method and apparatus for decoding baseband orthogonal frequency division multiplex signals  
A method and apparatus for decoding baseband OFDM signals include processing that begins by slicing each sub-carrier signal of the OFDM signal into a plurality of error terms. The particular number...
7414963 Dynamic zero suffix addition  
A method of processing a received OFDM symbol is disclosed. The received OFDM symbol has a symbol portion and a zero suffix portion. An information bearing portion of the zero suffix portion that...
7414962 OFDM diversity transmission  
In an OFDM transmission a transmission diversity technique is used without orthogonal signaling. The phases of the subcarriers received at the different antennas are compared by different...
7408997 Modulation/demodulation apparatus using matrix and anti-matrix  
A modulation and demodulation system is provided. The system uses n sub-carrier frequencies and an oversampling positive integer and includes a modulation circuit and a demodulation circuit. The...
7408872 Modulation of signals for transmission in packets via an air interface  
The invention relates to a method and to a modulator for modulating signals. The signals are to be transmitted by a device in packets via an air interface. Each packet is supposed to comprise at...
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