Peak value searching method and device

Abstract

Disclosed in the present invention is a peak search method comprising: multiple energy data are obtained; a first group of comparator circuits and a second group of comparator circuits jointly screen the obtained multiple energy data; after all energy data have been obtained and screened, the first group of comparator circuits receives and stores a primary candidate peak value while the second group of comparator circuits receives and stores a secondary candidate peak value; all primary candidate peak values stored by the first group of comparator circuits and the secondary candidate peak value stored by the second group of comparator circuits are screened; a peak value is obtained. Also provided in the present invention is a peak search device capable of searching quickly and receiving at least two peak values during each round of scanning, thereby reducing power consumption. The peak search method addresses both peak search speed and hardware logic resources; in addition, a key circuit of the peak search device of the present invention only requires one series of adders and registers to function, being simple and easy to implement, small, and low-cost.

Description

technical field [0001] The invention relates to peak search technology, in particular to a peak search method and device. Background technique [0002] Peak search is often used in application scenarios such as cell search, multipath search, and time slot synchronization, and has relatively high requirements for speed. For example, in Long-Term Evolution (LTE, Long-Term Evolution), when the cell is initially searched, 15 4800 sequences are searched every 5ms, and other processing takes about 420k cycles (cycle); when the neighbor cell search is started, 3 sequences are searched every 5ms. A 4800-sequence search, and there may be other tasks such as downlink reception, measurement, and neighbor cell search. [0003] The existing peak search circuit reads in a single energy data each time, and compares the read-in energy data with the maximum energy data obtained before, until each energy data is read one by one, the maximum value of the energy data can be obtained. value, a...

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Problems solved by technology

[0003] The existing peak search circuit reads in a single energy data each time, and compares the read-in energy data with the maximum energy data obtained before, until each energy data is read one by one, the maximum value of the energy data can be obtained. value, and it is necessary to perform forward and reverse scanning repeatedly to find other maximum values. For example, the Chinese patent application number 200510098701.4 proposes a method for peak search in WCDMA systems. The existing peak search method has low scanning efficiency , high power consumption, unable to meet the requirements of high throughput of appropriate processors

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