Hybrid ARQ with varying modulation and coding
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United States of America Patent
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May 21, 2020
app pub date -
Nov 14, 2019
filing date -
Nov 20, 2018
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Abstract
A method for receiving a WLAN data transmission includes receiving, at a first WLAN device from a remote WLAN device, a WLAN transmission including first bits that are modulated and encoded using a first MCS associated with a first modulation scheme and a first FEC coding rate. First soft-decoding metrics are computed for the first bits. A WLAN retransmission corresponding to the WLAN transmission is received. The WLAN retransmission includes second bits that are modulated and encoded using a second MCS associated with a second modulation scheme and a second FEC coding rate, the second MCS having better error performance than the first MCS. Second soft-decoding metrics are computed for the second bits. The first soft-decoding metrics and the second soft-decoding metrics are combined, to produce combined soft-decoding metrics. Data carried by the WLAN transmission is reconstructed by applying FEC decoding to the combined soft-decoding metrics.
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