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Multi-user detection using an adaptive combination of joint detection and successive interference cancellation

A technology for joint detection and combination of signals, applied in multiplexing communication, time division multiplexing systems, radio/induction link selection and arrangement, etc., can solve the problems of high detector complexity and occupation of receiver resources, etc.

Inactive Publication Date: 2003-07-09
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These detectors are complex and require extensive receiver resources

Method used

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  • Multi-user detection using an adaptive combination of joint detection and successive interference cancellation
  • Multi-user detection using an adaptive combination of joint detection and successive interference cancellation
  • Multi-user detection using an adaptive combination of joint detection and successive interference cancellation

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Embodiment Construction

[0015] figure 2 A diagram of a simplified transmitter 26 and receiver 28 for a joint detection (JD) and serial interference cancellation (SIC) adaptive combination "SIC-JD" used in a TDD / CDMA communication system. In a typical system, a transmitter 26 is located at each UE 14 1 to 14 3 , while multiple transmit circuits 26 for transmitting multiplex communications are located at each base station 12 1 to 12 5 middle. base station 12 1 Requires each active communication UE14 1 to 14 3 Each has at least one transmitting circuit 26 . SIC-JD receiver 28 may be located at base station 12 1 Medium, UE14 1 to 14 3 in, or in both. The SIC-JD receiver 28 receives communications from the plurality of transmitters 26 or transmission circuits 26 .

[0016] Each transmitter 26 transmits data over a radio channel 30 . The data generated by the data generator 32 in the transmitter 26 is transmitted to the receiver 28 via a reference channel. Depending on communication bandwidt...

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Abstract

A time division duplex communication system using code division multiple access transmits a plurality of data signals over a shared spectrum in a time slot. A combined signal is received over the shared spectrum in the time slot. The plurality of data signals are grouped into a plurality of groups. The combined signal is matched filtered based on in part symbol responses associated with the data signals of one of the groups. Data from each data signal in the one group is jointly detected. An interference signal is constructed based on in part the one group detected data. The constructed interference signal is subtracted from the combined signal. Data from the other groups is detected by processing the subtracted signal.

Description

[0001] This application claims U.S. Provisional Patent Application No. 60 / 189,680, filed March 15, 2000, and U.S. Provisional Patent Application No. 60, filed May 26, 2000. .60 / 207,700 priority. Background of the invention [0002] The present invention generally relates to wireless communication systems. In particular, the present invention relates to joint detection of multi-user signals in a wireless communication system. [0003] figure 1 is an illustration of a wireless communication system 10 . The communication system 10 has a user equipment (UE) 14 1 to 14 3 base station 12 for communication 1 to 12 5 . 12 per base station 1 Each has a corresponding working area, and in this working area, the base station and the user equipment 14 in the area 1 to 14 3 to communicate. [0004] In some communication systems, such as code division multiple access (CDMA) and time division duplex system (TDD / CDMA) using code division multiple access, multiple communications are ...

Claims

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Application Information

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IPC IPC(8): H04B1/7103H04B1/707H04B1/7093H04J3/00H04L25/03H04W72/04H04W88/08
CPCH04B1/7105H04B1/71072H04L25/03331H04L25/03305H04B1/7103H04B1/7093
Inventor R·M·米斯拉J·潘A·泽拉
Owner INTERDIGITAL TECH CORP
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