Systems and methods for transmit diversity for DFT precoded channels

摘要

A transmission method and apparatus that combines the benefits of DFT precoding and transmit diversity coding for PUCCH transmission. In one aspect, the invention provides an improved transmit diversity coding method and apparatus for DFTS-OFDM PUCCH with minimal impact on multiplexing capacity. In one embodiment, the improved transmit diversity method and apparatus has the feature of employing frequency-domain separation for the payload signals.

主权项

1. In a mobile terminal having a first antenna and a second antenna, a transmit diversity method for discrete Fourier transform (DFT) precoded channels, the method comprising:
producing a block of data symbols; transforming said block of data symbols to produce a first block of transformed symbols and a second block of transformed symbols; using the first antenna, transmitting the first block of transformed symbols and a first reference sequence, wherein the transmitting step occurs during a slot of a subframe of a radio frame; and using the second antenna, transmitting, during said slot, the second block of transformed symbols and a second reference sequence, wherein the first block of transformed symbols is transmitted using only a first set of subcarriers, the second block of transformed symbols is transmitted using only a second set of subcarriers that is orthogonal to the first set of subcarriers, and the first reference sequence and the second reference sequence are transmitted using a third set of subcarriers that comprises that first set of subcarriers and the second set of subcarriers.