In a direct sequence spread spectrum communication receiver, a system and method for recovering the timing of a pseudo-random noise (PN) sequence used for despreading the received signals. In one embodiment of the method, the receiver waits for detection of a SYNC field to confirm at least a...
Dept. of Electronics and Communication 19 3. Generation of PN sequences for both user, this PN sequence will act as a key for both transmitting and receiving end. 4. Now, again converting PN sequences into NRZ format. 5. Spreading of message signal1 (user 1) by PN code1. 6. ...
Iterative Construction of Optimum Signature Sequence Sets in Synchronous CDMA Systems Optimum signature sequence sets that maximize the capacity of single-cell synchronous code division multiple access (CDMA) systems have been identified. Op... S Ulukus,RD Yates - 《IEEE Transactions on Information Theo...
Acquisition of PN sequences in chip synchronous DS/SS systems using a random sequence model and the SPRT The use of a sequential probability ratio test (SPRT) for the acquisition of pseudonoise (PN) sequences in chip synchronous direct-sequence spread-spectrum... Chawla,K K.,Sarwate,... -...
sequence 序yIJts叫uenee;noc月e压oBaTe月、”oc几],给定集合元素的 定义在正整数集合上的函数,其值域包含在所研究的集合中. 序列f二N一卜X(其中N为正整数集,X为给定集合)的元素(elen姆nt)或项(term),是一个有序对(n,x),x二f(n),n任N,x6X,记作x。.正整数n称为x。的项数或指标(number(or认...
The invention relates to a FFT-based method for capturing a PN sequence in a CDMA 2000 1x EV-DO system, which comprises the main steps that: a receiving signal with the length of M chips is divided into L accumulation windows respectively containing N chips; initial positions between two ad...
PN码序列发生器基于FPGA的设计实现
1) pseudo noise (PN) sequence 扩频码(伪噪声码或PN码)序列 2) spread spectrum 扩频 1. Application of Costas loop in wirelessspread spectrumpositioning system; Costas环在无线扩频定位系统中的应用技术研究 2. Hybrid watermarking algorithm based onspread spectrumand quantization; ...
無線正交分頻多工系統中利用後置擬亂碼協助最小平方通道估測技術; Least-Square Channel Estimation Technique Assisted from Postfixed a PN Sequence for Wireless OFDM Communication System[[abstract]]近來,正交分頻多工技術受到很大的關注,由於它高資料... 通訊工程研究所 - 國立中央大學圖書館 被引量: 0发表: ...
Say initial output bit pattern is '001' . The same pattern repeats after 2^3-1 or 7 patterns. There are two types of PN sequences used in CDMA, 15 bit pattern and 42 bit pattern. PN sequence properties:1. Difference of number of 0's and 1's always be equal to 1 in any PN se...