Patent ID: 7751512
Filing Date: 2010-07-06
Classification: H04B,H04L

Abstract:
1. A demodulation method employed for removing unwanted interference in a received Time Divisional Duplex (TDD) burst, comprised of a first data field, a midamble, a second data field and a guard period, for canceling the effect of midamble interference from corresponding parts of the received burst, comprising: receiving and storing the received burst; determining a channel estimation from the midamble portion of the received burst; obtaining channel responses and midamble shift numbers from the determined channel estimation; utilizing multipliers to generate vectors from the channel responses and associated midamble shift numbers and subtractors for canceling the effect of a first midamble interference of the first data field on the midamble, and canceling the effect of a second midamble interference of the midamble on the second data field, wherein the first and second midamble interference are obtained at substantially the same time; obtaining channelization codes from said midamble shift numbers; and estimating symbol sequences from the burst in which midamble interference has been canceled.