In addition, pilot tone injection is implemented by adding a parallel optical DSB-SC modulation path for the millimeter-wave donwnconversion.
ROF系统由中心站、基站和无线终端组成，中心站与多个基站之间由光纤连接，基站与无线终端之间是毫米波无线信道。
ABSTRACT Orthogonal frequency division multiplexing modulation uses many parallel sub-carriers, which transmit low-speed data, to realize h...
正交频分复用调制利用许多并行的、传输低速率数据的子载波来实现高速率的通信。
The problem to be solved is how to avoid the confusion of the received signal caused by the crosstalk between multi-line parallel signals. In this thesis a combination of the OFDM and ICA is used to convert the complicated convolution-type ICA to the mode applied to simple instantaneous-liner-mixed system. The general steps and mathematical form of the modulation and demodulation are discussed and the feasibility of the method is demonstrated.
多路并行信号在多导体传输线上传送时，信号在导线间的相互串扰会导致接收信号的混乱，本文把正交频分复用技术(OFDM，Orthogonal Frequency Division Multiplexing)和独立量分析方法(ICA，Independent Component Analysis)结合起来，将较为复杂的卷积型ICA转化为较为简单的瞬时线性混合型ICA问题，以求从接收端混合的信号中分离出原信号。
An algorithm of symbol timing estimation in software radio is researched which estimates the symbol timing of linear and nonlinear modulation by the parallel estimation.
摘 要：研究了一种适合软件无线电的符号定时估计算法，该算法通过并行方法估计线性和非线性调制方式的符号定时。
With maximum likelihood estimation criterion, two kinds of parallel acquisition algorithms, which are based on data modulation and non-data modulation, are introduced respectively.
首先给出了BLDS-SS QPSK信号模型，在此模型基础上介绍了最大似然估计准则下基于数据调制和非数据调制两种并行捕捉方案。
The method of multilevel parallel phase modulation was proposed, which means two parallel multilevel phase shift keying signals were transmitted with one frequency at the same symbol period.
提出了高阶并行相位调制的方法，即在同一调制符号周期，使用同一频率、并行发送2路携带不同信息的高阶相位调制信号。
Hen transmitting amplitUde shift keying modulation singal and take LC Parallel resonance circuit as aerial, rectangle pulse may have appeared obvious waveform distortion.
用LC并联谐振回路作为天线发送振幅键控调制信号时，会出现较大的波形失真。
Serial to parallel, parallel to serial conversion and frequency modulation in this device are performed by computer software. The price of hardware is low. This device reliably supports data transmission of bit rates 50, 300, 600 or 1200 bps.
装置中采用计算机软件实现串并、并串变换及频率调制、其硬件成本低廉，工作可靠，可用于速率为50、300、600或1200bps的数传通信。
The Channel Encoding unit will be used to translate the parallel data stored in the memory into two streams of serial formatted data, which are fit for QPSK radio modulation, and the Channel Decoding unit will be used to realize the reversed processes.
信道编码单元将把海量存储器中的数据转换为适于QPSK射频调制格式化的串行数据流，信道解码单元实现相反的过程，文中详细给出了信道编码系统的原理、方法和实验结果。
Orthogonal frequency division multiplexing modulation (OFDM) technology use a number of parallel subcarriers to achieve high-speed data communications.
正交频分复用调制（OFDM）技术利用许多并行的子载波来实现高速的数据通信。
Orthogonal Frequency Division Multiplexing (OFDM) is a digital multi-carrier modulation technique, which uses several parallel orthogonal sub-carriers to transmit/receive a high data rate signal.
正交频分复用（OFDM）等多载波数字调制技术采用多路并行的正交子载波来发送/接收高速数据信号。
An improved triangle - wave pulse - width modulation current control method is presented, based on the mathematic model of parallel APF (Active Power Filter).
在分析有源电力滤波器APF（ActivePowerfilter）数学模型的基础上，提出了改进的三角波脉宽调制电流控制方法。
This paper presents a simplified mathematic model of parallel APF, and an improved method of current control with triangle-wave pulse-width modulation.
给出了并联型有源电力滤波器系统简化数学模型，详细探讨了有源电力滤波器中常采用的三角波脉宽调制电流控制方法，在此基础上提出了一种改进的三角波脉宽调制电流控制方法。
Secondly, the short-wave MODEM hardware platform. based-on DSP is developed, and on the basis of which, the algorithms such as. bit synchronization algorithm, multi-channel parallel modulation and demodulation algorithm, and CRC-16 table lookup algorithm are implemented.
设计了基于DSP的短波调制解调器硬件系统，并在此硬件系统上实现了位同步提取算法、多路并行调制解训算法以及CRC-16的查表快速算法等核心算法。
It receives taste information from the rostral nucleus of solitary tract, and sends two parallel ascending pathways, one to thalamo-cortical axis that involves the transmission of taste information, and the other directly to the several areas of the ventral forebrain including the CeA that involves the modulation of taste and feeding.
本研究结果表明，损毁了CeA的大鼠对各种味觉刺激溶液的摄入量均降低，并且对不同浓度溶液的影响不同，提示CeA可能通过影响中枢味觉的评估机制，从而改变大鼠对不同味觉刺激的欣快阈值，进而参与摄食行为的调控。
Then we focus on the decoding algorithms of multilevel coded modulation, including multi-stage decoding, parallel decoding and hybrid decoding, and their simulation results under AWGN channel are compared. It implies that the performance of hybrid decoding is better than other decoding algorithms.
然后重点研究了多级编码调制的三种译码算法：多级译码、并行译码和混合译码，并且在高斯信道下对其进行了仿真，仿真结果显示混合译码的性能明显优于其它两种译码方法。
Then, according to the geometrical optics, the modulation of structure light by the parallel projective illumination and the emanative projective illumination is discussed to educe the height formula corresponding to these two illuminative mode.
然后，基于几何光学分析，讨论物体轮廓对平行投影及发散投影结构光场调制问题，导出与这两种照明方式相适应的高度公式。
The emitting coil and capacitance are connected in parallel and form a resonant amplitude - modulation circuit, which converts the impedance into output voltage.
利用发射线圈与电容并联的谐振调幅电路，将线圈阻抗变化转换成电压的输出。
This paper traces the development of the algorithm in the past years and introduces its improvement in parallel processing, distribution coefficients and threshold modulation.
通过跟踪近年来误差扩散算法的技术发展，介绍了误差扩散算法在并行处理、分配系数、阈值调制等方面的改进方案。
Information source is sent to different antennas after channel coding and serial to parallel converter, then it is transmitted by these antennas after a signal mapping and modulation.
信源数据经过串并转换、信道编码和符号映射之后被多根天线同时发送出去。