Low-complexity bandwidth signal digital frequency selection method

A low-complexity, wide-band signal technology, applied in the field of digital frequency selection of wide-band signals, digital frequency selection of wide-band signals, and can solve the problems of complex logic implementation of low-pass filters

Active Publication Date: 2011-08-10
河南同方科技有限公司
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This will lead to very complex implementation logic o

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[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] The present invention is a low-complexity broadband signal digital frequency selection method for a communication system. The method uses a parallel filter structure to replace the traditional low-pass filter structure in the process of signal processing to reduce hardware implementation time. The logic processing complexity; and then use the Hilbert transform to omit the operation of frequency selection for the orthogonal branch, so that the number of parallel processing branches is halved, thereby reducing the complexity of signal processing.

[0056] see Figure 4 , introduce the concrete operation steps of the inventive method:

[0057] (1) After the receiving antenna receives the high-frequency signal, it is processed according to the traditional meth...

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Abstract

The invention discloses a low-complexity bandwidth signal digital frequency selection method for a communication system. In signal processing, a parallel filter structure is adopted instead of a conventional low-pass filter structure so as to reduce a logic processing complexity in hardware realization; and a frequency selection operation on a quadrature channel is saved by utilizing Hilbert transform to halve parallel processing channels, so signal processing complexity is reduced. By the method, the frequency selection operation can be effectively finished, the frequency selection of any carrier number and/or any bandwidth is supported, and the engineering realization complexity is greatly reduced. The method provided by the invention is widely applicable to a plurality of communicationsystems such as global systems for mobile communication (GSM), time division-synchronization code division multiple access (TD-SCDMA) communication systems, wideband code division multiple access (WCDMA) communication systems, code division multiple access 2000 (CDMA2000) communication systems, long term evolution communication systems and the like to form digital front-ends of communication equipment of different standards, such as repeaters, base stations and the like. Generally, the method is vast in popularization and application prospect.

Description

technical field [0001] The present invention relates to a digital frequency selection method for broadband signals, to be more precise, to a low-complexity low-pass filter implemented in a communication system using a parallel structure and using Hilbert transform to remove data processing of orthogonal branches. The invention discloses a wideband signal digital frequency selection method, which belongs to the technical field of digital frequency selection of communication systems. Background technique [0002] see figure 1 , introduces the traditional digital frequency selection method, the signal processing process mainly includes: receiving, frequency selection and sending three parts, in which the receiving and sending parts have a symmetrical structure. [0003] Since the signals received and transmitted by the antenna in the communication system are in extremely high frequency bands, it is difficult to process them directly. Therefore, it is usually necessary to perf...

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Application Information

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IPC IPC(8): H04L5/02H04L27/00
Inventor 田耘袁志巍范帅关佐峰徐文波
Owner 河南同方科技有限公司
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