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Multi-user equalizing method and device in wireless communication system

A wireless communication and equalization device technology, applied in multiplex communication, code division multiplexing system, transmission control/equalization, etc., can solve problems not suitable for communication systems with real-time requirements, and achieve accurate weighting coefficients Effect

Inactive Publication Date: 2008-07-09
NXP BV
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Problems solved by technology

[0029] Since the above training method is based on the bit rate to adjust the weighting coefficient method, the speed of parameter adjustment is limited by the feedback cycle, so it is not suitable for communication systems with higher real-time requirements

Method used

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  • Multi-user equalizing method and device in wireless communication system
  • Multi-user equalizing method and device in wireless communication system
  • Multi-user equalizing method and device in wireless communication system

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Embodiment Construction

[0045] The basic principle of the present invention is to adjust the weight coefficient based on the chip rate, that is, the weight coefficient adjustment period is the chip period. Since a bit is composed of SF (spreading factor) chips, the chip rate is SF times the bit rate, so the convergence speed of the weight coefficient adjustment method based on the chip rate is faster than the conventional method based on the bit rate.

[0046] The present invention adjusts the weighting coefficient by directly comparing the difference between the weighted signal and the reference signal, thereby greatly shortening the adjustment period.

[0047] The principle of the present invention will be explained below with reference to FIG. 2.

[0048] Fig. 2 is a block diagram showing a multi-user equalizer according to an embodiment of the present invention. The equalizer includes a sampling device 21, a weighting device 22, an adjusting device 26, and a summing device 25.

[0049] The operation ...

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PUM

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Abstract

A method and device for multi-user equalization in a wireless communication system. The equalization device includes: a plurality of weighting devices, which are used to perform weighting processing on the received multi-channel signals according to a plurality of adjustable weighting coefficients, so as to obtain multiple weighted results. The multi-channel signals include channel fading Known training sequence and user data; A plurality of adjustment devices are used to compare the plurality of weighted results of the training sequence output by the plurality of weighting devices with a plurality of known reference signals respectively, and respectively according to the comparison results Adjusting the weighting coefficient of each weighting device, so that the weighting device uses the adjusted weighting coefficient to weight the user data; and combining means for outputting the user data from the plurality of weighting devices The multiple weighted results are combined to obtain a combined equalized signal.

Description

Technical field [0001] The present invention relates to a wireless communication system, in particular to an adaptive multi-user equalization device and method used in a receiver of a mobile communication system. Background technique [0002] In the propagation path of wireless signals, they are usually blocked by obstacles, causing reflections, scattering and attenuation, etc., resulting in multipath effects, so that the signals received by the receiver antenna end actually arrive from different paths. The linear superposition of path signals, and the multipath signals from different paths have different delays, amplitudes, phases and frequencies. On the other hand, for wireless communication systems that use code division multiple access (CDMA: Code Division Multiple Access) technology, because the wireless interface uses different channelization codes to distinguish users, multiple users can share the same frequency and time slot resources. . In theory, orthogonal channelizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04L25/03H04B1/7103H04B1/712H04B7/005H04J13/00
CPCH04B1/7103H04B1/712H04B2201/70701H04L25/03114
Inventor 吴凡
Owner NXP BV
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