Multi-user detection in mobile terminal for reducing interference
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A mobile terminal and multi-user technology, applied in the direction of multiplexing multiple codes, multiplexing communication, code division multiplexing system, etc., can solve the problems of imprecise mobile terminal interference cancellation and insufficient
Inactive Publication Date: 2005-05-11
KONINKLIJKE PHILIPS ELECTRONICS NV
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[0005] However, in particular, the interference cancellation within the mobile terminal is insufficient as a result of said adaptive learning (which is a slowly converging process) and / or said estimation (which is an imprecise process), So known telecommunication systems have disadvantages
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[0018] figure 1 Shows a telecommunications system according to the invention, which includes a base station 1 according to the invention and a mobile terminal 2-9 according to the invention. Base station 1 includes a smart antenna for dividing a cell into eight sectors: The first sector includes terminals 2-6, where terminals 2-5 are far away and transmit with higher power, and terminal 6 is closer to base station 1. And using lower power transmission, the second sector includes terminal 7 using higher power transmission, etc., and the eighth sector includes terminals 8 and 9, where terminal 8 uses lower power to transmit, and terminal 9 uses higher power. Power transmission.
[0019] figure 2 The base station 1 according to the present invention and the mobile terminal 4 according to the present invention are shown.
[0020] The base station 1 includes a controller 10 having a processor 20 coupled to a generator 21 and a selector 22. The output terminal of the processor 20 is ...
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Abstract
Interference cancellation within a mobile terminal (4) in a communication system like a Direct Sequence-Code Division Multiple Access system or a DS-CDMA system can be improved by providing the mobile terminal (4) with a multi-user detector (41, 42, 43) . These multiuser detectors require spreading codes of other mobile terminals (2, 3, 5, 6, 7, 8, 9), which are available in the base station (1) and therefore need to be sent to the mobile terminal (4). By further sending the power information of other branch terminals (2, 3, 5, 6, 7, 8, 9) to the mobile terminal (4), the selector (52) can perform intelligent , and select the most important extension codes, thereby reducing computational complexity. By positioning a selector (22) within the base station (1), intelligent selection is also possible within said base station. Preferably the selection is made antenna sector by antenna sector and / or antenna sector dependent, in which case direction information from other mobile terminals (2, 3, 5, 6, 7, 8, 9) needs to be used.
Description
Technical field [0001] The present invention relates to a telecommunication system including a base station and a mobile terminal, the base station including a generator for generating spreading codes, and at least one mobile terminal including an interference canceller for reducing interference. [0002] The present invention also relates to a base station used in a telecommunication system including a base station and a mobile terminal, the base station includes a generator for generating spreading codes, and at least one mobile terminal includes an interference canceller for reducing interference, and the present invention The invention relates to a mobile terminal used in a telecommunication system including a base station and a mobile terminal. The base station includes a generator for generating spreading codes, and the mobile terminal includes an interference canceller for reducing interference. The present invention also It relates to a method for reducing interference in ...
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