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, the receiver performs a slow tracking to maintain the synchronization of the receiver's ...
The power button glows blue when the system hangs during the boot-up sequence. Cyan Light The power button glows cyan if a CPU error is encountered during boot-up. Green Light A green light indicates a memory error. Yellow Light A yellow light indicates a display error. Red Light A...
In a direct sequence spread spectrum communication system, a system and method for recovering the timing of a pseudo-random noise (PN) sequence used for despreading the received signals. In one embodiment, the communication system is a time-division duplexing (TDD) or a time-division multiple-...
systems,whichisubiquitousinverynonlinearsystem.Invirtueofitscharacteristicssuchas non-cycle,widespectrumandsensitivitytotheinitialvalues.ThechaoticPNsequencesarehighly randomandhavelongperiodswhichmeanthatit’ssuitableforsecretcommunicationandspreading codegeneration.Basedontheanalysisofanewcontinuoushyperchaoticsystemwhich...
Keywords and phrases: sequential estimation, PN sequence, acquisition, spread spectrum, digital matched filter. 1. INTRODUCTION PN sequence acquisition is a precondition for stable and re- liable spread spectrum communication. The research on PN sequence acquisition has been continuing for more than 20...
(non user-relevant system code: 16#00000001 16#10020000 16#00000000)" not longer appears when the connection partner does use a protocol sequence conforming to RFC 1006 when communicating with a SIMATIC S7-1500/ET 200SP CPU. In special cases fail-safe CPUs no longer go into STOP following ...
PN码序列发生器基于FPGA的设计实现
ffsetestimationalgorithmbasedonPNsequence (清华大学)江海周世东 JIANGHAIZHOUSHIDONG 摘要:本文提出了一种基于时域PN序列导频相关性的频偏估计算法,通过计算接收信号和发送信号共轭乘积的自相关函 数,将频偏估计问题转化为一个单频谱估计问题,并且给出了简化的谱估计算法,从而避免了频率搜索,具有较低的实现复 ...
segments, and provide the set of one or more PN vectors for each selected request, wherein the one or more PN sequences are used to spectrally spread data in a W-CDMA communication system and the memory stores an X(i) sequence and a Y(i) sequence defined by W-CDMA for scrambling ...
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; ...