Patent ID: 9571140
Date: 2017-02-14
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method of transmitting two groups of data symbols, the method comprising: generating a first group of data symbols; conjugating and time-reversing the first group of data symbols to generate a reversed-conjugated first group of data symbols; appending a first quantity of zeros before and a second quantity of zeros after the reversed-conjugated first group of data symbols to generate a first block of pre-spread symbols; appending the first quantity of zeros before and the second quantity of zeros after the first group of data symbols to generate a second block of pre-spread symbols; spreading the pre-spread symbols for each of the first and second blocks of pre-spread symbols to create a first block of spread symbols and a second block of spread symbols, respectively; mapping, for each of the first and second blocks of spread symbols, each of the spread symbols to an occupied subcarrier; performing modulation on the first and second blocks of spread data symbols mapped to subcarriers to create a first block of time domain symbols and a second block of time domain symbols, respectively; and transmitting the first block of time domain symbols via a first resource and transmitting the second block of time domain symbols via a second resource where the second resource is different from the first resource; wherein the zeros appended before and after the reversed-conjugated first group of data symbols creates, in the first block of time domain symbols, a first number of near-zero symbols before and a second number of near-zero symbols after a plurality of non-zero time domain data symbols.