Method and apparatus for producing given bandwidth and power spectral density noise

A technology of power spectral density and bandwidth, applied in the field of communication signal processing, can solve the problems of not making full use of the existing modules, the instrument is expensive, flexible, and free, and achieves flexible input parameter setting, avoids redesigning algorithms, and improves simulation. The effect of efficiency

A technology of power spectral density and bandwidth, applied in the field of communication signal processing, can solve the problems of not making full use of the existing modules, the instrument is expensive, flexible, and free, and achieves flexible input parameter setting, avoids redesigning algorithms, and improves simulation. The effect of efficiency

CN1567768AInactive Publication Date: 2005-01-19GLOBAL INNOVATION AGGREGATORS LLC
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  • Method and apparatus for producing given bandwidth and power spectral density noise
  • Method and apparatus for producing given bandwidth and power spectral density noise
  • Method and apparatus for producing given bandwidth and power spectral density noise

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Embodiment Construction

[0033] In this example, WCDMA uplink simulation is divided into four parts according to functions: uplink reception simulation data source 11, radio frequency subsystem equivalent model 12, baseband signal processing module 13, and algorithm verification 14. The data source conforming to the WCDMA protocol is generated by the 3GPP data source module 1111, and first enters the code shaping filter 1112, where the transfer function of the code shaping filter conforms to the root-raised cosine characteristic, simulating the processing process at the mobile station side, and the output signal passes through the channel model Module 1113, simulates the spatial transmission process of the signal. When the signal arrives at the base station side, it first enters the array antenna for reception, and is processed by the array model module 1114 to obtain vector data, which is then output through the code shaping filter 1115 to simulate the processing process at the base station side. Two c...

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Abstract

The invention relates to a method and device of generating a noise given with band width and power spectrum density, including: a given band width noise module, a power coefficient calculating module, and a power correcting module, where the given band width noise module includes a white noise module, a filter module, and a power normalization module, a generated white noise in the white noise module is inputted into the filter module for filtering, and the output signal is inputted into the power normalization module for normalizing; the power coefficient calculating module calculates out a needed noise power coefficient; the noise power coefficient and the normalized white noise pass through the power correcting module, which outputs a white noise meeting the requirement of power spectrum density. It is applied to the simulation of frequency expanded communication systems, such as IS-95, CDMA2000, WCDMA, etc.

Description

technical field [0001] The invention belongs to the field of communication signal processing, and relates to the simulation of generating baseband signals required by a certain normalized signal-to-noise ratio in a spread-spectrum digital communication system, in particular to a method and device for generating noise with a given bandwidth and power spectral density. Background technique [0002] In the simulation of spread spectrum communication system, it is necessary to generate a normalized signal-to-noise ratio E b / N 0 data source. E. b is the signal bit energy, N 0 is the noise power spectral density. The signal is a definite signal, and the normalized signal-to-noise ratio requirement is actually a parameter to determine the noise. Noise generally refers to white noise. In conventional simulation software, a generation module of white noise is provided, and its power is 1. After passing through the front-end filter in the actual channel, the bandwidth of the n...

Claims

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Application Information

Patent Timeline
19 Jan 2005
Publication
CN1567768A
IPC
H04B1/69; H04B7/26; H04B15/00; H04J13/00
Inventors
袁翔; 刘刚