System and method for equalization and demodulation of orthogonal frequency division multiplexing communication
An orthogonal frequency division and multiplexing communication technology, which is applied to multi-frequency code systems, equalizers, baseband system components, etc., can solve complex problems and achieve the effect of simplifying the implementation complexity
Active Publication Date: 2010-10-27
北京中科微投资管理有限责任公司
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[0003] However, most of the current equalization methods used in multi-carrier communication systems are division methods. In the implementation process, the division method is more complicated than the multiplication method whether DSP or ASIC is used. Therefore, it is hoped to propose a multiplication equalization method instead of the division equalization method method to reduce the implementation complexity of multi-carrier modulation system equalization
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0031] The present invention obtains channel state information in the frequency domain through reasonable use of channel estimation and channel tracking. In a multi-carrier modulation system, channel estimation, channel tracking, channel equalization and channel demodulation are organically combined, and multiplicative equalization is used to replace traditional The division equalization method effectively simplifies the implementation complexity of equalization at the receiver side of the multi-carrier modulation system.
[0032] Below first the realization principle of the present invention is set forth:
[0033] Such as figure 1 as shown, figure 1 It is a structural schematic diagram of the current basic OFDM system ...
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The invention discloses a system for balancing and demodulating an orthogonal frequency division multiplexing communication, belonging to the orthogonal frequency division multiplexing communication technical field of the communication technique. The system comprises a fast Fourier transformation unit, a channel estimation unit, a channel tracking unit, a multiplication balancing unit and a demodulating unit. The system feedbacks the frequency domain channel state estimated by the channel estimation unit to a data receiving and demodulating unit, to realize the multiplication balancing and demodulation of the receiving system. The invention discloses a method for balancing and demodulating the orthogonal frequency division multiplexing communication. The invention synthesizes channel estimation, channel tracking, channel balancing and channel demodulation in a multi-carrier demodulation system, combines multiplication balancing and demodulation methods to replace traditional division balancing method, thereby simplifying the balancing complexity of a multi-carrier demodulation system.
Description
technical field [0001] The invention relates to the technical field of Orthogonal Frequency Division Multiplexing (OFDM) in communication technology, in particular to a system and method for equalization and demodulation of Orthogonal Frequency Division Multiplexing communication. Background technique [0002] Orthogonal frequency division multiplexing is widely used in modern communication protocols as a new and efficient digital transmission method, such as IEEE 802.x, ADSL and HIPERLAN II. Compared with other modulation techniques, the significant advantage of this technology is that the effective transmission of information in multipath channels can be realized through the parallel transmission of serial data, and the channel estimation and equalization methods are simple. [0003] However, most of the current equalization methods used in multi-carrier communication systems are division methods. In the implementation process, the division method is more complicated than ...
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IPC IPC(8): H04L27/26H04L25/02H04L27/01
Inventor 张浩陈杰亓中瑞邱昕
Owner 北京中科微投资管理有限责任公司