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Low complexity data detection using fast fourier transform of channel correlation matrix

A correlation matrix and channel technology, applied in the transmission system, electrical components, etc., can solve complex power consumption, battery life reduction, high complexity and other problems

Inactive Publication Date: 2007-07-04
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have high complexity
High complexity leads to UE14 1 incremental power consumption at the

Method used

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  • Low complexity data detection using fast fourier transform of channel correlation matrix
  • Low complexity data detection using fast fourier transform of channel correlation matrix
  • Low complexity data detection using fast fourier transform of channel correlation matrix

Examples

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Embodiment Construction

[0013] Figure 2 depicts a simplified transmitter 26 and receiver 28 using low complexity data detection in a CDMA / TDD communication system. In a typical system, the transmitter 26 is located in each UE14 1 to 14 3 , and the multiplexing circuit 26 for transmitting multiplex traffic is located at each base station 12 1 to 12 5 middle. A low-complexity data detection receiver 28 may be located at the base station 12 1 , UEs14 1 to 14 3 or both. Receiver 28 may be used for UE 14 1 , multi-user or single-user detection of high data rate services such as 2 megabits per second (Mbs) for media. When only one UE14 1 The receiver 28 can also be used by the base station 12 when transmitting in time slots 1 .

[0014] The transmitter 26 can transmit data on the radio frequency channel 30 . A data generator 32 in the transmitter 26 may generate data that is transmitted to the receiver 28 . The spreading and modulating means 34 can spread the data and can time-multiplex the sp...

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Abstract

A combined signal is received over a shared spectrum in a time slot in a time division duplex communication system using code division multiple access. Each data signal experiences a similar channel response. The similar channel response is estimated. A matrix representing a channel of the data signals based on in part the estimated channel response is constructed. A spread data vector is determined based on in part a fast fourier transform (FFT) decomposition of a circulant version of the channel matrix. The spread data vector is despread to recover data from the received combined signal.

Description

[0001] This application is a divisional application of the No. 02804604.8 invention patent application of the above-mentioned name submitted on August 6, 2003. (1) Technical field [0002] The present invention relates to wireless communication systems, and more particularly, the present invention relates to data detection in wireless communication systems. (2) Background technology [0003] FIG. 1 depicts a wireless communication system 10 . The communication system 10 has and user equipment (Ues) 14 1 to 14 3 communication base station 12 1 to 12 5 . Each base station 121 has its operating area and user equipments (UEs) 14 1 to 14 3 Communication related operating area. [0004] Like code division multiple access (CDMA) and time division dual access using code division multiple access (TDD / CDMA), multiple communications are transmitted on the same frequency spectrum. These communications are differentiated by their channelization codes. In order to use spectrum mo...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B1/7105
Inventor 潘俊霖帕萨波拉丁·德艾利拉·莱尔
Owner INTERDIGITAL TECH CORP
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