Device and method for calculating channel status index

Abstract

The invention relates to a channel state information calculating device and a method thereof, more particularly to a channel state-information (CSI) calculating device applied to a dual-carrier modulation (DCM) and a method thereof. Channel equalization quantum is sent into the system, the absolute value of each equalization quantum is calculated by utilizing an absolute value calculation unit which is electrically connected with a channel classification unit; signals are divided into data on two channels, each channel is electrically connected with an equalization value comparing unit and a relatively small value is obtained after comparison and calculation; the small value is taken as the channel state information on the two channels defined by the device and the method; the adoption of the channel state information in an encoder can effectively promote the efficiency of a dual-carrier modulation circuit in a multi-path fading channel.

Description

technical field [0001] The present invention discloses a channel state index calculation device and method, especially applied to the calculation of channel state index of a dual-carrier modulation, so as to improve the performance of the communication system in the multi-path attenuation channel. Background technique [0002] In the process of signal demodulation, because the received signal is affected by the transmission channel, the performance of the overall system will often deteriorate. However, if the Channel State Information (CSI) can be correctly calculated and used in the signal decoding process, it will be easier It can significantly improve the overall system performance and increase the transmission distance. [0003] In a communication system, the above-mentioned channel state indicators are used to understand the transmission status between the signal transmitting end and the receiving end in advance. The receiving end judges the channel state indicators of ...

AI Technical Summary

Problems solved by technology

[0012] It can be known from the above known techniques that when using the known modulation method, each data is only transmitted through a single sub-channel, such channel state index is easy to calculate

However, if the conventional technology is applied to a dual-carrier modulation (DCM) system, each piece of data needs to be transmitted through two sub-channels. For such a channel state index, the conventional technology will use equal weights to add (Equal -Gain Combining, EGC) or calculated by other methods, but the circuit is quite complicated, and it is impossible to obtain the correct CSI value and effectively improve system performance

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