A fpga multi-carrier communication system based on filter bank
A multi-carrier communication and filter bank technology, applied in multi-carrier systems, modulated carrier systems, multi-frequency code systems, etc., can solve problems such as large amount of calculation, high implementation complexity, and unfavorable FPGA implementation, and achieve strong resistance Interference ability, guaranteed reception effect, the effect of solving spectrum efficiency problem and multipath fading problem
Active Publication Date: 2021-06-29
西安烽火电子科技有限责任公司
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[0005] As an important choice for future mobile communication multi-carrier system design, FBMC technology has attracted more and more people's research interest; because in FBMC technology, multi-carrier performance depends on the design of the prototype filter and the design of the modulation filter, and in order to To meet the requirements of specific frequency response characteristics, the length of the prototype filter is required to be far greater than the number of sub-channels, the implementation complexity is high and the amount of calculation is large, which is not conducive to FPGA implementation; at the same time, because the data is over-sampled by K times before filtering, resulting in The filtering rate is K times the data rate, which is a very big test for the computing power of the FPGA
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[0025] The present invention is achieved in this way, a filter bank-based multi-carrier communication method, which divides the high-speed data stream into M parallel sub-data streams, so that each sub-data stream has a lower transmission rate, and uses M sub-data streams The streams are QAM-modulated with the prototype filter coefficients respectively, and the transmitted signal x(k) after QAM modulation is obtained:
[0026]
[0027] Among them, m∈[0,M], M represents the number of high-speed data streams divided into sub-data streams, and M represents the number of sub-carriers; n∈[-∞,+∞], a m (n) indicates the symbol data that needs to be filtered at the nth sampling beat in the mth sub-data stream; K indicates the set oversampling multiple; j indicates the complex number unit; h(k-n*K) indicates the nth of the prototype filter coefficient; e represents the exponent power, and k represents the discrete sampling point variable.
[0028] Another object of the present inve...
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The invention belongs to the field of wireless communication systems, and discloses a multi-carrier communication system based on a filter bank. The main ideas are as follows: the system includes a ROM module, a quadrature amplitude modulation module, an IFFT module, a prototype filter, and a frame header Module and parallel-serial conversion module, the output end of the ROM module is electrically connected to the input end of the quadrature amplitude modulation module, the output end of the quadrature amplitude modulation module is electrically connected to the input end of the IFFT module, the output end of the IFFT module is electrically connected to the input end of the prototype filter, and the prototype filter The output terminal is electrically connected to the input terminal of the frame header module, and the output terminal of the frame header module is electrically connected to the input terminal of the parallel-serial conversion module; the system technology itself is based on the spectral efficiency problem and the multipath fading problem and can effectively complete the FPGA hardware implementation, It can effectively solve the problem of spectral efficiency and multipath fading, and has strong anti-interference ability to ensure the signal reception effect.
Description
technical field [0001] The invention belongs to the technical field of wireless communication systems, and in particular relates to a multi-carrier communication system based on a filter bank. The technology itself is based on effectively solving spectrum efficiency problems and multipath fading problems and completing FPGA hardware implementation. Background technique [0002] Future mobile communication technology is a new generation of mobile communication systems after 2020, and its technology development is still in the exploratory stage. In future mobile communication systems, due to the need to support high data rates, bandwidths up to 1GHz may be required; but in a certain In some lower frequency bands, it is difficult to obtain continuous broadband spectrum resources, and in these lower frequency bands, there are some unused spectrum resources (blank spectrum) in some wireless transmission systems (such as television systems); however, these blank The positions of t...
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IPC IPC(8): H04L27/26H04L27/36
CPCH04L27/2628H04L27/264H04L27/362
Inventor 李波张凡周兆军王小军张健王陈春张勋勋闫旭仇妙月王冲
Owner 西安烽火电子科技有限责任公司