Channel estimation in a wireless communication system

Details Channel estimation in a wireless communication system Channel estimation in a wireless communication system

2007-08-21

2007-08-21

Hsu, Alpus H. (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Fourier transform

C370S280000, C370S335000, C370S342000, C375S131000, C375S147000, C375S346000

Reexamination Certificate

active

10308473

ABSTRACT:
A plurality of communication bursts are transmitted substantially simultaneously in a time slot of a time division duplex/code division multiple access communication system. The communication system has a maximum number of K midamble shifts. Each burst has an assigned midamble. Each midamble is a shifted version of a basic midamble code having a period of P. A combined signal is received. The combined signal includes a received version of each of the communication burst's midambles. A P by P square circulant matrix is constructed including the K midamble shifts. A channel response is determined for each of the K midamble shifts using a prime factor algorithm (PFA) discrete Fourier transform (DFT) algorithm, the received combined signal and the P by P square circulant matrix. The PFA DFT algorithm has a plurality of stages. Each stage has P inputs.

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