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A tdd-lte and fdd-lte auxiliary synchronization symbol detection method

A technology that assists synchronization and detection methods, which is applied to synchronization devices, electrical components, wireless communications, etc., and can solve problems such as large resource consumption

Inactive Publication Date: 2015-09-09
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method capable of simplifying LTE-assisted synchronization symbol detection, which can reduce detection time, resource consumption and implementation complexity without loss of detection performance, so as to solve the resource consumption of existing implementation methods huge problem

Method used

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  • A tdd-lte and fdd-lte auxiliary synchronization symbol detection method
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  • A tdd-lte and fdd-lte auxiliary synchronization symbol detection method

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Embodiment Construction

[0038] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0039] refer to figure 2 , the present invention first uses the R2MDC structure to calculate the posterior probability (correlation result) of the equalized auxiliary synchronization symbol. R2MDC structure such as Figure 4 As shown, the unit is composed of a butterfly operation unit, a register bank and a bidirectional switch. The bidirectional switch controls the input and output of the butterfly operation unit. A total of 16 beats are required to complete a 32-point FHT using this device. Table 1 shows the states of the 4 bidirectional switches in 16 beats, where 0 means the switch is closed to "A", and 1 means the switch is closed to "B". Table 1 is the R2MDC switch control state.

[0040] Table 1

[0041] switch

switch status

#1

[0，0，0，0，0，0，0，0，1，1，1，1，1，1，1，1]

#2

[0，0，0，0，1，1，1，1，0，...

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Abstract

The invention discloses a TDD-LTE (time division duplex-long term evolution) and FDD-LTE (frequency division duplex-long term evolution) secondary synchronization signal detection method. The method comprises the step that relative calculation is conducted on received secondary synchronization signals, and the following steps for relative results of the total 336 secondary synchronization signals: the secondary synchronization signals with the same cell ID N<(1)>[ID] and different subframes are subjected to subframe detection, the secondary synchronization signal with maximal relative energy is selected as the secondary synchronization signal to be selected, and the step can be called a predetection step; a result obtained in the predetection step is further subjected to m0 and m1 detection according to the relative energy; and the secondary synchronization signals with the maximal energy are selected as a final result. The relative calculation adopts an R2MDC (radix-2 multi-path delay commutator) structure to calculate the secondary synchronization signals. With the adoption of the method, on the premise that the detection performance is not damaged, the detection time can be shortened, the resource consumption and the realization complexity can be reduced, and the problem that the resource consumption is very high for the available implementation method is solved.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, in particular to a TDD-LTE and FDD-LTE auxiliary synchronization symbol (SSS) detection method. Background technique [0002] LTE (LTE: Long Term Evolution, Long Term Evolution), as the next-generation mainstream communication technology, has the characteristics of high transmission rate, high spectrum utilization rate, and simple receiver. LTE is divided into two duplex modes, TDD and FDD. The frame structure of the two modes is as follows figure 1 shown. [0003] The main task of LTE cell detection is to find the primary synchronization symbol (PSS: Primary Synchronization Signal, primary synchronization symbol) and secondary synchronization symbol (SSS: Secondary Synchronization Signal, secondary synchronization symbol), so as to determine the cell ID, timing (Timing) and other information ( such as frequency offset, etc.). For TDD-LTE, the primary synchronization symbol is lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
Inventor 单鸣诸烜程
Owner MEDIATEK INC