Compressed orthogonal frequency division multiplexing (OFDM) symbols in a wireless communication system
First Claim
1. A method for generating a physical layer (PHY) data unit for transmission via a communication channel, the method comprising:
- adding, at a first communication device, respective numbers of pre-encoder padding bits to respective sets of information bits corresponding to respective second communication devices to generate respective sets of padded information bits corresponding to the respective second communication devices, wherein the respective numbers of pre-encoder padding bits are determined such that the padded information bits, after being encoded, fill one or more OFDM symbols up to a common boundary within a last OFDM symbol;
encoding, at the first communication device, the respective sets of padded information bits to generate respective sets of coded bits;
generating, at the first communication device, the one or more OFDM symbols to include (i) the respective sets of coded information bits in an initial portion of the one or more OFDM symbols up to the common boundary within the last OFDM symbol to allow a receiving device to stop decoding the one or more OFDM symbols after decoding the initial portion of the one or more OFDM symbols, and (ii) respective numbers of post-encoder padding bits, added to the respective sets of coded bits, in a remaining portion of the one or more OFDM symbols following the common boundary; and
generating, at the first communication device, the PHY data unit to include at least the one or more OFDM symbols.
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Abstract
One or more first padding bits are added to information bits to be included in a data portion of a data unit such that the information bits, after being encoded, fill one or more OFDM symbols up to a boundary within a last OFDM symbol. The information bits and the first padding bits are encoded to generate coded bits. After encoding, coded bits corresponding to the last OFDM symbol are padded, or constellation points generated based on the coded bits corresponding to the last OFDM symbol are padded, such that the padded coded bits or the padded constellation points occupy a remaining portion of the last OFDM symbol after the boundary. The last OFDM symbol of the data portion is generated to include the coded information bits corresponding to the last OFDM symbol, the first padding bits and second padding bits or padding constellation points added after encoding.
120 Citations
20 Claims
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1. A method for generating a physical layer (PHY) data unit for transmission via a communication channel, the method comprising:
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adding, at a first communication device, respective numbers of pre-encoder padding bits to respective sets of information bits corresponding to respective second communication devices to generate respective sets of padded information bits corresponding to the respective second communication devices, wherein the respective numbers of pre-encoder padding bits are determined such that the padded information bits, after being encoded, fill one or more OFDM symbols up to a common boundary within a last OFDM symbol; encoding, at the first communication device, the respective sets of padded information bits to generate respective sets of coded bits; generating, at the first communication device, the one or more OFDM symbols to include (i) the respective sets of coded information bits in an initial portion of the one or more OFDM symbols up to the common boundary within the last OFDM symbol to allow a receiving device to stop decoding the one or more OFDM symbols after decoding the initial portion of the one or more OFDM symbols, and (ii) respective numbers of post-encoder padding bits, added to the respective sets of coded bits, in a remaining portion of the one or more OFDM symbols following the common boundary; and generating, at the first communication device, the PHY data unit to include at least the one or more OFDM symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A first communication device, comprising:
a network interface device having one or more integrated circuits configured to add respective numbers of pre-encoder padding bits to respective sets of information bits corresponding to respective second communication devices to generate respective sets of padded information bits corresponding to the respective second communication devices, wherein the respective numbers of pre-encoder padding bits are determined such that the padded information bits, after being encoded, fill one or more OFDM symbols up to a common boundary within a last OFDM symbol; encode the respective sets of padded information bits to generate respective sets of coded bits; generate the one or more OFDM symbols to include (i) the respective sets of coded information bits in an initial portion of the one or more OFDM symbols up to the common boundary within the last OFDM symbol to allow a receiving device to stop decoding the one or more OFDM symbols after decoding the initial portion of the one or more OFDM symbols and (ii) respective numbers of post-encoder padding bits, added to the respective sets of coded bits, in a remaining portion of the one or more OFDM symbols following the common boundary; and generate a physical layer (PHY) data unit to include at least the one or more OFDM symbols. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification