cppm

The PSD of CPPM signal was deduced in theory .

从理论上推导了其信号的功率谱密度表达式。

The modified method eliminates the possible occurrence of boast and serious error propagation in CPPM , as well as possesses good security , high reliability and easy realization .

改进后的混沌脉冲位置调制方法能够克服CPPM容易出现的发散和严重的误差传播，具有保密性好、可靠性高、设备的实现更加简单等优点。

First , the current study situation of pure electric vehicle and CPPM brushless motor were reviewed , then the structure and performance characteristics in CPPM brushless motor were analyzed .

论文首先综述了纯电动汽车以及CPPM无刷电机的研发现状，分析了CPPM无刷电机的结构和性能特点。

Analysis and simulation show that , for UWB system , CPPM can obtain more even PSD , its discrete PSD is smaller than TH-PPM ' s. Therefore it has less interference on other communication systems , lower probability of detection and higher security . 5 .

分析和仿真表明UWB系统CPPM方式可以获得更均匀的功率谱，其离散谱密度明显低于TH-PPM，从而能减少对其它通信系统的干扰、具有更低截获概率和高保密性。

To eliminate the two main disadvantages in chaotic pulse position modulation ( CPPM ), a modified chaotic pulse position modulation ( CPPM ) strategy for ultra-wide bandwidth impulse radio communication system is firstly proposed here , as well as be discussed carefully with distinct chaotic mappings .

为克服混沌脉冲位置调制（CPPM）存在的缺点，提出了一种新的可用于超宽带冲击无线电（UWB-IR）的改进型通信方案，并采用不同混沌映射进行研究。

Using Time-Hopping pulse position modulation ( TH-PPM ), an UWB system has some disadvantages that the discrete power spectral density ( PSD ) is centralized and may arouse multiple-access interference . An UWB system utilizing chaotic pulse position modulation ( CPPM ) based on Tent map was introduced .

针对跳时脉位调制（TH-PPM）的超宽带系统信号离散功率谱分量集中、易引起多址干扰的缺点，引入了基于Tent映射的混沌脉位调制（CPPM）UWB系统。