Abstract: A wireless communications system base station (101), upon receiving (202) from a mobile station (102) a wireless transmission that comprises a suggested transmitter-receiver configuration, can respond (in appropriate instances) by automatically transmitting (203) to the mobile station a wireless transmission comprising an indication to use instead a default transmitter-receiver configuration. By one approach, the latter action can be based, at least in part, upon a determination regarding reliability (301) of that suggested transmitter-receiver configuration (which might comprise, for example, a direct or indirect measure of quality of the channel by the default transmitter-receiver configuration was received) to provide a corresponding reliability assessment. The latter can then be used (302) to determine whether to use this suggested transmitter-receiver configuration for a subsequent communication with the mobile station.

Abstract: A wireless communications system base station (101), upon receiving (202) from a mobile station (102) a wireless transmission that comprises a suggested transmitter-receiver configuration, can respond (in appropriate instances) by automatically transmitting (203) to the mobile station a wireless transmission comprising an indication to use instead a default transmitter-receiver configuration. By one approach, the latter action can be based, at least in part, upon a determination regarding reliability (301) of that suggested transmitter-receiver configuration (which might comprise, for example, a direct or indirect measure of quality of the channel by the default transmitter-receiver configuration was received) to provide a corresponding reliability assessment. The latter can then be used (302) to determine whether to use this suggested transmitter-receiver configuration for a subsequent communication with the mobile station.

Abstract: A method for processing an information sequence with an iterative decoder is provided. The information sequence is divided into a current window and at least one additional window. The current window of the information sequence is selected. At least one metric value for a current recursion of the current window is computed based on metric values from the additional window of the information sequence, wherein the additional window is a past iteration. Systems and programs for processing an information sequence are also provided.

Abstract: System (100) for generating syndrome (222) usable in decoder (130) includes reducer (340) and converter (330). Reducer (340) employs information to generate representation (342). Converter (330) generates, with employment of representation (342), syndrome (222).

Abstract: A method of processing an information sequence with a decoder is provided. A window within the information sequence is selected. A training period is calculated for the window. At least one recursion of the window is initialized based on the calculated training period. Systems and programs for processing the information sequence are also provided.

Abstract: A method and system (102) provide adaptive modulation/coding with distribution of excess resources based on one or more system criteria. The system (102) may be any system with more than one modulation rate or more than one coding rate and may be a wireless communication system using CDMA, TDMA, OFDM or any other signal formats. Generally, the method determines excess resources of the system based on desired characteristics of links supported by the system. The excess resources may be any number of system resources, such as transmit power. These excess resources are then distributed to the links based on various system criteria, such as to increase system coverage, to increase system capacity, to modify a data rate profile of the system or to reduce interference in the system. Methods for providing such distribution of the excess resources are also provided for equal data rate systems.

Abstract: The log-add kernel operation is represented as a summation of an average and a correction factor composed of a constant and a term based on a difference between the input arguments. In a described embodiment, the correction factor is approximated using the reduction of the correction factor into a Taylor series expansion, which may be defined around the difference between the input arguments as approximately zero. The approach may be further optimized to provide the Taylor series expansion as being modified to compute the correction factor with simple additions, multiplications, and shift operations. If the input arguments are close to each other, the new computed representation may be used, and if the arguments are further apart, the max operation is used. The log-add kernel operation also may be extended to more than two arguments, for application, for example, in the kernel operation of the generalized Viterbi decoder with a branch fan-in greater than 2.

Abstract: The invention provides a method for operating a hybrid automatic repeat request communication system wherein it is determined whether a receiver can process a data packet, and a self-decode request associated with the data packet is sent based on the determination.

Abstract: In accordance with the preferred embodiment of the present invention, excess power is distributed to certain streams in order to increase the stream's signal quality, and thus, its encoding rate. Although certain streams will have their overall power, and thus their signal quality reduced, in the preferred embodiment of the present invention the reduction in signal quality is limited so that the encoding rate for these streams remains unchanged.

Abstract: In accordance with the preferred embodiment of the present invention, excess power is distributed to certain streams in order to increase the stream's signal quality, and thus, its encoding rate. Although certain streams will have their overall power, and thus their signal quality reduced, in the preferred embodiment of the present invention the reduction in signal quality is limited so that the encoding rate for these streams remains unchanged.

Abstract: The invention provides a method for operating a hybrid automatic repeat request communication system wherein it is determined whether a receiver can process a data packet, and a self-decode request associated with the data packet is sent based on the determination.

Abstract: System includes decoder. Decoder performs a portion of an intermediate Chase iteration, of a series of Chase iterations for decoding input data, to obtain a successful hard-decision decoding result for input data. Decoder determines that the successful hard-decision decoding result comprises overall Chase decoding result, for the series of Chase iterations, with employment of reliability information for at least one location of input data and without employment of information that specifies, for input data, error location within input data. The intermediate Chase iteration and a Chase iteration comprise consecutive Chase iterations having only one value difference between respective code patterns thereof. Decoder skips at least one intermediate Chase iteration to proceed to the intermediate Chase iteration that obtains the successful hard-decision decoding result.

Abstract: A method of preparing an information sequence before encoding is provided. An information sequence size of the information sequence is compared to an interleaver size of an interleaver. At least one symbol is added to the information sequence to match the information sequence size to the interleaver size. Systems and programs for preparing an information sequence before encoding are also provided.

Abstract: A method of processing an information sequence with a decoder is provided. A window within the information sequence is selected. A training period is calculated for the window. At least one recursion of the window is initialized based on the calculated training period. Systems and programs for processing the information sequence are also provided.

Abstract: A method for processing an information sequence with an iterative decoder is provided. The information sequence is divided into a current window and at least one additional window. The current window of the information sequence is selected. At least one metric value for a current recursion of the current window is computed based on metric values from the additional window of the information sequence, wherein the additional window is a past iteration. Systems and programs for processing an information sequence are also provided.

Abstract: A method and system (102) for providing criterion based adaptive power allocation with selective determination of modulation and coding is provided. A method is presented which consists of providing adaptive power allocation with a target signal quality for each link based on a system criterion, and a modulation/coding rate for each link based on a signal quality associated with the transmit power of each link. A further method is provided which may alternatively, or additionally, consist of APA in which the transmit power for each link is assigned in an attempt to obtain a signal quality for each link within a range between or equal to a minimum and maximum. An additional method is disclosed consisting of APA in which the transmit power for each link is assigned in an attempt to obtain a signal quality for each link as close as possible to a common signal quality, when the power allocation method has a limited dynamic range.

Abstract: A method 400, phone 203, radio transmitter 205, and communication system 200 including a nonsystematically shortened code encoder 202 having an input 204 adapted to receive input digital signals having a number of bits, the nonsystematically shortened code encoder 202 is adapted to produce encoded shortened code digital signals in accordance with the input digital signals. The communication system further including a nonsystematically shortened code decoder 208 adapted to receive the encoded shortened code digital signals, wherein the nonsystematically shortened code decoder 208 is adapted to produce an estimate of the input digital signals and an error detection flag.

Abstract: A window error detector for a receiver capable of operating in a discontinuous transmit mode includes a soft decision decoder (210) producing soft output and generating window error signals. A detector (214) is coupled to the soft decision decoder for detecting a bad frame when the window error exceeds a bad frame threshold, wherein the threshold is altered based on the discontinuous transmit state. A turbo decoder (210) for a receiver includes a soft decision decoder and a window error detector (214) coupled to the soft decision decoder. The window error detector generates a bad frame indication. The turbo decoder stops iterative processing of the data associated with a window when the window error detector detects that the window does not result in a bad frame indication.

Abstract: A first group of bits (100, 102, 106), e.g., header symbols/bits, are interleaved to form a first group of interleaved bits. A second group of bits (104), e.g., data symbols/bits, are interleaved to form a second group of interleaved bits. The first and second groups of interleaved bits are mapped to an information burst (114). The first and second groups of interleaved bits may be mapped to the information burst relative to a group of known symbols (116) forming a training sequence. A disadvantaged bit location, i.e., a bit location within the mapping having a relative high probability of incurring a bit error, is identified and an advantaged bit location, i.e., a bit location within the mapping having a relatively low probability of incurring a bit error, is identified.

Abstract: The present invention provides a method (400), error control system (200), phone (209) and error control apparatus (208) including a hexacode-based Golay decoder (210) adapted to receive values defining Golay encoded data signals and to generate a estimate of original input data signals (216) and a plurality of metrics associated with Golay encoded data signals, and an error detection circuit (212) coupled to the hexacode-based Golay decoder (210) for comparing the plurality of metrics and providing an error detection flag (214).