为了解决上述问题，我们研制了基于伪随机码调制的超声波测距。
In order to solve the above problems, we develop ultrasonic range-finder which is based on pseudorandom code.
针对此系统，提出了简化的LDPC码编码调制译码初始化算法。
For theis system, a simplified LDPC coded modulation decoding initialization algorithm is proposed.
为了解决在水下遥控中遇到的困难，把伪码调制技术引入了水下遥控领域。
In order to solve the difficulties encountered by underwater remote control, the pseudo-code modulation technology have been introduced into the field of underwater remote control.
被高速伪随机码调制的扩频信号，其伪随机码是具有随机编码信号特征的周期信号。
The spread spectrum (SS) signal is modulated by high-rate pseudo noise code, and belongs to typically periodic signal.
本文推导非同步c D M A系统多址干扰表达式，计算正交码调制码组相关性对多址干扰的影响。
The performance representation indicating the effects of correlation of orthogonal code modulation sequences on MAI suppression in nonsynchronous CDMA system has been derived.
超宽带冲激无线电技术是近年来新兴的通信技术，其主要核心技术是采用了冲激脉冲技术和跳时码调制。
The UWB impulse radio technology is a new kind of communication method these years, in which the swash impulse and time-hopping code modulation techniques are mainly applied.
根据无线电近炸引信的高可靠和抗干扰能力要求，提出采用“20判7”的判决算法和伪码调制的终端方案。
According to the requirements of high reliability and anti-jamming capability for proximity fuze, the PN code modulator scheme and the selecting 7 in 20 decision algorithm are proposed.
为使星载激光高度计实现高空间分辨率，提出了一种联合采用伪随机码调制光纤激光器和单光子计数的测距方法。
A method combining pseudorandom modulation of the fiber laser and single-photon counting is proposed to realize a high spatial resolution for the space-borne laser altimeter.
基于OFDM(正交频分复用)系统，提出了一种新的空频时三维编码，将网格编码调制和差分空时分组码进行组合链接设计。
Based on OFDM system, a novel space-frequency-time code which combined trellis-coded modulation with differential space-time block code was proposed.
最后，论文以ARAPA原模图ldpc码为分量码，结合多级编码调制(MLC)技术，设计了一种兼顾带宽和功率效率的编码调制系统。
Finally, a multilevel coding (MLC) scheme with ARAPA protograph LDPC codes as component codes is designed. This scheme takes both bandwidth and power efficiency into account.
随机二相码调相PD（脉冲多普勒）引信，是一种较为新颖的噪声调制引信体制。
The random binary phase code phasing PD fuze is a novel modulated system of noise.
分析了GRI脉冲序列与参考脉冲，以及调制码组与罗兰C脉冲组的时间关系。
The relationships between GRI pulse sequences and reference pulses, as well as between modulation code groups and Loran-C pulse groups are analyzed.
利用降低码片速率有效降低每路信号占有的带宽，将每路信息的比特分配在不同的调制载波上，减少了各路信号间的多址干扰。
Frequency width is compressed by decreasing signature-code speed and using bit-signal modulates by different carrier so as to decrease multi-user interference.
讨论了卫星导航中BOC调制解调的原理和实现方法，并着重研究了接收机的码跟踪技术。
This paper discusses the theory and the realization approach of BOC modulation and demodulation in satellite navigation system, and focuses on the BOC code tracking technology.
提出了利用相位调制器和色散补偿光纤(DCF)把非归零(NRZ)码信号转换成为占空比可调的归零(RZ)码信号的方案。
Utilizing phase modulator and dispersion compensation fiber (DCF) link, a non-return-zero (NRZ) data format is converted to return-zero (RZ) data format with tunable duty ratio.
随着调制阶数的增加，正交空时分组码的性能越来越差，但传输速率变大；
If the modulation order is different, the higher the order is, the worse the performance is, but the transmitting rate is bigger.
将解调的1位信号值与定位系统调制码逐位进行逻辑组合(例如异或)，以产生多个1位相关值。
The demodulated 1-bit signal values are bitwise logically combined (e. g., XORed) with the positioning system modulation code to produce a plurality of 1-bit correlation values.
响应该相关性度量，检测定位系统调制码。
The positioning system modulation code is detected responsive to the correlation metric.
数字调制技术是BPL时码发播和自主授时的基础。
Digital modulation technology is the foundation of BPL time code broadcast and independent time service.
利用删除卷积码实现自适应调制编码是解决上述问题的一个关键技术。
Adaptive modulation and coding by using convolutional codes is a key technology to solve the above problem.
发射端分集、编码和调制结合空时格码，可以有效地提高信号在无线衰落信道中传输的有效性和可靠性；
Space-time trellis code combining space diversity with code and modulation, can improve efficiency and reliability of communication system in wireless channel efficiently.
该文提出了一种利用随机多元码脉位调制(PPM)和脉间伪随机或随机二元序列相位调制(PM)相结合的混合波形设计方法。
The design method for hybrid waveforms utilizing ran-dom poly-cell code pulse position modulation (PPM) and pulse-to-pulse binary sequences phase modulation (PM) is introduced in this paper.
伪码调相-载波调频复合信号的识别特征包括伪码特征和频率调制特征。
The features of pseudo code PM-carrier FM combined signal include the pseudo code and the modulation frequency.
它所发送的信号是由一组正交的正弦信号作为副载波，用码元周期为T的不归零方波作为基带码型调制而成的。
The transmitted signals which were modulated is a group of orthogonal sine signals as subcarrier and non-regular zero square waves that the code elements period is t as baseband coded formats.
首先研究基本的发射机，包括卷积编码、交织、扰码、沃尔什调制、正交扩频以及基带滤波。
Firstly the basic transmitter, including convolutional encoding, interleaving, scrambling, Walsh modulation, quadrature spreading and baseband filtering was studied.
本文提出了用随机多元码进行脉位调制（PPM）获得随机信号雷达波形的新方法。
The new method for obtaining a random signal radar waveform by means of random multi- element code PPM is proposed.
分析了GRI脉冲序列与参考脉冲，以及调制码组与罗兰C脉冲组的时间关系。
The time relationships between GRI pulse sequences and reference pulses, as well as between modulation codes and Loran-C pulse groups are analyzed.
对于PS K调制下的空频块码，复数球形译码相对实数球形译码有较低的复杂度。
The complex sphere decoding has lower complexity compared with real sphere decoding for space-frequency block codes with PSK modulation.
分析了工作原理和数学模型，研究了它的抗干扰特性，给出了离散随机脉位序列调制码的产生方案。
The block diagram of the system is given and its working principle and mathematic model are analyzed. And also, its anti jamming performances are studied.
分析了工作原理和数学模型，研究了它的抗干扰特性，给出了离散随机脉位序列调制码的产生方案。
The block diagram of the system is given and its working principle and mathematic model are analyzed. And also, its anti jamming performances are studied.
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