Peak value searching method and device

Abstract

The invention discloses a peak value searching method comprising the following steps of: acquiring a plurality of energy data, screening the acquired energy data commonly by a first group of comparison circuits and a second group of comparison circuits, storing main candidate peak values obtained by the first group of comparison circuits after all energy data are acquired and screened, and storing secondary candidate peak values obtained by the second group of comparison circuits; and screening all the main candidate peak values stored by the first group of comparison circuits and all the secondary candidate peak values stored by the second group of comparison circuits, thus obtaining a peak value. The invention further discloses a peak value searching device which is fast in speed and at least can obtain two peak values by each scanning process, thus being capable of saving power consumption and integrating the peak value searching speed and hardware logic resources; besides, a key circuit of the peak value searching device can be realized only by a series of adders and registers, thus being simple and easy to realize, small in area and low in 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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