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Simplified block linear equalizer with block space time transmit diverstiy

A block and time technology, applied in the field of communication systems, can solve problems such as high receiver costs and high complexity

Inactive Publication Date: 2004-05-12
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The receiver in such a system would have a high complexity due to the use of two joint detectors, resulting in higher receiver cost

Method used

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  • Simplified block linear equalizer with block space time transmit diverstiy
  • Simplified block linear equalizer with block space time transmit diverstiy
  • Simplified block linear equalizer with block space time transmit diverstiy

Examples

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Embodiment Construction

[0013] figure 2 It is a block diagram of a receiver 10 according to a preferred embodiment of the present invention, preferably located at a user terminal equipment (UE) in a CDMA communication system. Receiver 10 may be located at a base station and operate during uplink communication, although it is preferred to have the receiver located at the UE. The receiver 10 includes a BSTTD junction detection device (BSTTD JD) 12 , a channel estimation device 13 and an antenna 16 . The antenna 16 of the UE receives various radio frequency (RF) signals including a first and a second communication burst from a transmitter.

[0014] The first and second communication bursts include the first and second data fields respectively as described above. The first data field includes a first portion D1 and a second portion D2; the second data field includes a negative conjugate of D2 -D2* and a conjugate D1* of D1. A typical communication burst has two parts of the data field separated by a ...

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PUM

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Abstract

The present invention is a method and system for receiving data transmitted using block space time transmit diversity (BSTTD) in a code division multiple access (CDMA) communication system. The system comprises a transmitter, for transmitting a first data field using a first antenna and a second data field using a second antenna, and a receiver. The receiver includes an antenna for receiving the first and second transmitted data fields, and a BSTTD joint detector which determines symbols of the first and second transmitted data fields using a minimum mean square error block linear equalizer model and an approximated Cholesky decomposition of the model. The receiver is simplified by the use of block banded propagation matrices.

Description

(1) Technical field [0001] The invention relates to a communication system requiring Code Division Multiple Access (CDMA) technology. More particularly, the present invention relates to a transmission diversification scheme applicable to a CDMA communication. (2) Background technology [0002] Spatial diversification has been proposed to support very high data rate users in third generation broadband code division multiple access systems. When using multiple antennas, the system can achieve better gain and link quality, which will result in increased system capacity. Typically, diversification has been exploited by using beam deflection or via diversification combining. [0003] Recently, collaborative usage diversification through the use of space-time codes has been achieved. Such a system could theoretically increase capacity by a factor equal to the number of transmit and receive antennas in the array. Space-time codes operate on generating a block of input symbols t...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B7/06H04L1/06
Inventor 金永禄
Owner INTERDIGITAL TECH CORP
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