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Apparatus and method for measuring noise power in CDMA mobile communication system

A mobile communication system, noise power technology, applied in the direction of code division multiplexing system, multiplexing communication, communication between multiple stations, etc., can solve the problem that it is difficult to obtain the approximate value of SNR

Inactive Publication Date: 2003-12-03
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the signal component power (E C ) will result in an estimated noise power (E C +N O ) and net noise power (N O ), which makes it difficult to get an approximation of the exact SNR

Method used

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  • Apparatus and method for measuring noise power in CDMA mobile communication system
  • Apparatus and method for measuring noise power in CDMA mobile communication system
  • Apparatus and method for measuring noise power in CDMA mobile communication system

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Embodiment Construction

[0028] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, well-known functions and constructions are not described in detail since they would obscure the invention in unnecessary detail.

[0029] figure 1 It shows the overall configuration of the mobile station transmitter in the CDMA mobile communication system. Such as figure 1 As shown, the mobile station transmitter uses different orthogonal codes generated by the orthogonal code generators 112-116 and 120-124 to spread the transmission signal to be transmitted on a specific channel, and uses the adders 126 and 128 to spread the spectrum The sending signal is summed. The transmit signals output from adders 126 and 128 are applied to complex PN spreader 130, and spreader 130 will utilize the complex spreading sequence PN provided by spreading sequence generator 132 1 and PN Q Spread the transmitted signal. The sp...

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Abstract

A noise power measuring system and method for a base station receiver are disclosed. In the system and method, a received signal is despread and the noise power of the despread received signal is estimated. An orthogonal code generator generates a noise power measurement orthogonal code, which is orthogonal to all the orthogonal codes presently being used by the mobile station. A correlator connected to the orthogonal code generator performs a correlation operation between the noise power measurement orthogonal code and the despread received signal. A noise power measurer, connected to the correlator, measures the noise power from the output of the correlator.

Description

technical field [0001] The present invention generally relates to a base station receiver of a CDMA (Code Division Multiple Access, Code Division Multiple Access) mobile communication system, and particularly relates to a device and method for measuring noise power of a received signal. Background technique [0002] Generally, CDMA communication systems perform forward and reverse power control. For reverse power control, the base station sends a power control command to the mobile station to maintain a specific signal-to-noise ratio (SNR) on the particular reverse channel being received from the mobile station, thereby controlling the mobile station. The transmit power of the station. For this, the base station requires a device for measuring the SNR of the reverse channel. In the reverse power control mode, when the signal received from the mobile station has a lower SNR, the base station commands the mobile station to increase its transmission po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04B1/709H04B1/7097H04B7/005H04B7/26H04B17/00H04J13/00H04L1/20H04L7/00
CPCH04W52/24H04B17/336H04L1/20H04B1/709H04B1/7097H04B17/006
Inventor 尹裕皙孟胜柱尹淳暎
Owner SAMSUNG ELECTRONICS CO LTD
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