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Method for reducing power consumption of synchronous module of OFDM system

A technology for synchronizing modules and power consumption, which is used in multi-frequency code systems and other directions

Active Publication Date: 2010-10-06
宁夏储芯科技有限公司
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Problems solved by technology

Furthermore, the carrier offset must be correctly estimated, because any carrier offset will generate ICI

Method used

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  • Method for reducing power consumption of synchronous module of OFDM system
  • Method for reducing power consumption of synchronous module of OFDM system
  • Method for reducing power consumption of synchronous module of OFDM system

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Embodiment Construction

[0072] 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.

[0073] The method for reducing the power consumption of the synchronous module of the OFDM system provided by the present invention is proposed based on the low-power design method and simulation of the synchronous module of the China Mobile Multimedia Broadcasting (CMMB) system. The extraction of the common factor of the correlation operation in formula (8) can optimize the circuit design of the synchronization module, reduce the bit width of the memory and the multiplier in the operation, and thus effectively reduce the power consumption of the system synchronization module.

[0074] Such as figure 2 as shown, figure 2 It is a flowchart for realizing the method for reducing the power consumption of the OFDM system sy...

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Abstract

The invention discloses a method for reducing the power consumption of the synchronous module of an OFDM system. The method comprises the following steps: step 101: performing swept frequency correlation operation to the sign bits of the received synchronization sequence and the local known sequence in the time domain to obtain the estimated value of integer carrier frequency offset; and step 102: performing correlation operation to the received sign bits corrected by frequency offset in the time domain to obtain the precise position of the FFT window. By using the method of the invention, the synchronous property of the system can be ensured while the working power of the synchronous module of the system can be reduced.

Description

technical field [0001] The invention relates to the technical field of baseband receiver algorithm and VLSI design, in particular to a method for reducing power consumption of a synchronous module of an Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0002] The primary problem facing the communication system is to ensure the synchronization of time points and frequency points. In addition, due to the non-ideal effects of wireless channels and analog RF devices, the signal received at the receiving end will be greatly distorted from the original signal. How to compensate for these non-ideal factors has a great impact on the performance of OFDM systems; more importantly, For mobile multimedia-oriented baseband chip design, synchronous performance and low power consumption design are even more challenging. [0003] Therefore, at least two synchronization tasks must be completed before OFDM signal demodulation (Wang Yumin, OFDM Key Technology an...

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Application Information

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IPC IPC(8): H04L27/26
Inventor 毛剑慧黑勇周玉梅乔树山
Owner 宁夏储芯科技有限公司
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