Q sequence generating method and apparatus for turbo coding of wcdma system
A technology for generating devices and sequences, applied in the direction of coding, transmission systems, coding components, etc., can solve the problems of long q-sequence clock cycle process, difficult circuit hardware implementation, hard hardware implementation, etc., to achieve simple hardware logic judgment and universal performance and save space
Inactive Publication Date: 2011-04-20
SANECHIPS TECH CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0021] 1) Since finding the q sequence requires the greatest common factor, the finding of the greatest common factor requires factorization of p-1, which is difficult to implement in hardware. If the q sequence for each p is stored in memory, each Each p needs to store the values of 20 q sequences, which requires a lot of memory (memory)
[0022] 2) It can also be seen from the above definition that both the p sequence and the q sequence are prime number sequences, which must satisfy gcd(q i , p-1)=1 is to satisfy q i There is no integer multiple relationship between p-1. It is necessary to divide the two numbers. The division circuit that is not a multiple of 2 is very difficult to implement in hardware. Only IP can be used, and the circuit area is also large.
If multiple subtraction of 2 numbers is used to determine whether the remainder is 0, the clock cycle process of generating the q sequence is too long
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0072] The method and device of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0073] According to some characteristics of the q sequence itself, careful analysis can be obtained, except for the q sequence 0 Except for 1, other values are a subset of the p-sequence, and at most 1 or 2 values in the p-sequence are deleted. In general, the value to drop from this all possible values when analyzing all possible values of the q-sequence and different p-values.
[0074] For each distinct p-value, the q-sequence may remove p-values such as Figure 5 , when R is 5, the last 4 values of the q sequence are the first 4 values of the p sequence (except p is 23 and 29 need to delete 11 and 7), for the case of R is 10 and 20, from Figure 5 It can be seen from the analysis that all the ps that may be deleted are only 7, 11, 13, 17, 19, 23, 29, 37, 41, 43, and 53, so that the q sequence can be r...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
This invention puts forward a generating method for q sequence of turbine coding in a WCDMA system, which first of all analyzes all possible values of sequence q under different p values, stores them in a first storage in order and then analyzes values to be eliminated from the possible values, each time when generating sequence q, the method reads out a number from the first storage and applies a logic circuit to judge if sequence q of the current p value is a value being eliminated, if not, it is written into a second storage and a next value is read out from the first storage till finishing generating sequence q.
Description
technical field [0001] The present invention relates to the third generation mobile communication system, in particular, relates to a type of channel coding in a Wideband Code Division Multiple Access (WCDMA) system, which is produced by the q sequence in the internal interleaver of a Turbo (turbo) encoder Methods and Apparatus. Background technique [0002] WCDMA is one of the mainstream systems of the third generation (3G) mobile communication system. Among them, the HSDPA (High Speed Downlink Packet Access: High Speed Downlink Packet Access) technology proposed in the R5 version has become a current research hotspot. HSDPA technology is the most important technology to improve the high-speed downlink data transmission rate of WCDMA network. It is proposed by 3GPP in the R5 protocol in order to meet the asymmetrical requirements of uplink and downlink data services. It can be used without changing the existing WCDMA system network structure. On the basis of this, the...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03M13/00
Inventor 徐心明
Owner SANECHIPS TECH CO LTD