Patent ID: 7701916
Filing Date: 2010-04-20
Classification: H04B,H04L

Abstract:
1. A mobile time division duplex receiver comprising: A. a receiving antenna receiving radio signals that include equal time frames that are divided into equal time slots, each time slot includes a first group of data symbols, midamble symbols of a predetermined training sequence that are cyclically time shifted for different broadcast antenna and users, a second group of data symbols, and a guard period, the midamble symbols including a cyclic prefix obtained by copying over the tail end of the cyclically time shifted midamble symbols, the antenna providing received signals representing the data symbols and midamble symbols, the data symbols being block space time encoded over a block size of at least four symbols; B. filter circuitry having an input coupled to the received signals from the receiving antenna, the filter circuitry operating to provide channel estimate output signals of a first broadcast antenna and a second broadcast antenna in response to the midamble symbols, including the cyclic prefix; and C. space time transmit diversity decoder circuitry having inputs connected to the channel estimate output signals.