Nec Laboratories America, Inc.

Columbia University

Chen Gong

Xiaodong Wang

Guosen Yue

Xiadong Wang

Methods, systems, and media for partial downloading in wireless distributed networks are provided. In some embodiments, methods for selecting numbers of symbols to be transmitted on a plurality of channels are provided, the methods comprising: for each of the plurality of channels, calculating using a hardware processor an increase in power that will be used by that channel if it transmits a symbol; selecting one of the plurality of channels with the smallest increase in power using the hardware processor; and allocating the symbol to the one of the plurality of channels using the hardware processor.

Methods, systems, and media for partial downloading in wireless distributed networks

Message-wise unequal error protection is provided using codeword flipping to separate special and ordinary codewords without discarding any codewords. Special messages are encoded to ensure the codeword weight is less than a certain threshold weight. Ordinary messages are encoded to ensure the codeword weight is greater than the threshold weight. The bits of the codeword are flipped to enforce the weight criterion. Ordinary and special messages are encoded using different encodings to provide different levels of error protection. Upon receipt, codewords are separated into special and ordinary codewords for appropriate decoding. If a codeword is of indeterminate type, it is iteratively processed as both a special codeword and an ordinary codeword. The decoding result of each process is periodically checked to determine which decoding result satisfies decoding criteria.

Message-wise unequal error protection

A method for low-density parity-check hard decision decoding includes computing, for every decoding iteration, a discrepancy of extrinsic messages responsive to channel inputs of a receiver, performing a flipping of the channel inputs responsive to a comparison of the discrepancy of extrinsic messages to a flipping threshold, the flipping threshold for each decoding iteration being determined based on a threshold computation responsive to a channel error probability estimation in a first iteration of a decoding of the channel inputs, and check node decoding responsive to the flipping of channel inputs.

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New York, NY, United States of America

Chen Gong