Patent ID: 8213484
Filing Date: 2012-07-03
Classification: H04L,Y02D

Abstract:
1. An apparatus comprising: a first processor operative to perform differential modulation and spectral spreading for a first set of at least one data rate for IEEE 802.11b; a second processor operative to perform forward error correction (FEC) encoding, symbol mapping, and spectral spreading for a second set of at least one data rate, wherein the second processor is operative to process a protocol data unit comprising a preamble, a header, and a data field and wherein the header comprises a rate field indicating a data rate used for the data field and a rate feedback field indicating a data rate to use for feedback; and a multiplexor circuit, responsive to a control signal, to selectively provide output from the first processor if the first set of at least one data rate for IEEE 802.11b is selected or output from the second processor if the second set of at least one data rate is selected.