公开(公告)号：US20030223355A1

公开(公告)日：2003-12-04

申请号：US10308473

申请日：2002-12-03

Applicant: InterDigital Technology Corporation

Inventor： Jung Lin Pan ,  Younglok Kim ,  Ariela Zeira

IPC: H04J011/00

CPC classification number: H04L25/0244 ,  H04L25/0224

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.

Abstract translation: 在时分双工/码分多址通信系统的时隙中基本上同时发送多个通信脉冲串。 通信系统具有最大数量的K个中间码位移。 每个突发都有一个指定的中间码。 每个中间码是具有周期为P的基本中间码的移位版本。接收组合信号。 组合信号包括每个通信突发的中间码的接收版本。 构造P平方循环矩阵的P包括K个中间码位移。 使用素数因子算法（PFA）离散傅里叶变换（DFT）算法，接收的组合信号和P乘P平方循环矩阵，为每个K中间码位移确定信道响应。 PFA DFT算法具有多个阶段。 每个阶段都有P个输入。