signal n. 1.信号,暗号;信号器。 2.动机,导火线 (for)。 3.预兆,征象。 call signal 【无线电】呼号。 an alarm signal 警报(器)。 an information signal 〔美国〕暴风警报(旗)。 an international code of signals 国际通用信号。 a signal of distress =a distress signal 船只失事信号。 adj. 1.暗号的,作信号用的。 2.显著的,非常的,优越的。 a signal victory [defeat] 大胜[败]。 vt.,vi. (〔英国〕 -ll-) 发信号[警报]给(人、船等);用信号[警报]通知(暴风、危险等);用动作[手势]示意;预示。 a signaling bomb 信号弹。
In digital signal technique , a signal that uses a positive ( or negative ) excursion and ground as the two binary signal states 在数字信号技术中,用正(或负)向电压与地两个电平来表示二进制“ 1 ”和“ 0 ”的一种信号
For example , one baud equals one bit per second in a train of binary signals and one3 - bit value per second in a train of signals each of which can assume one of eight different states 例如, 1波特在二进制信号序列中等于每秒1比特;在八种不同状态中任选一种状态的信号序列中等于每秒1个3位值。
The mcml circuits output low swing signal , while it is necessary to amplify it so as to interfacing the binary signal . an low - swing - signal - amplifying circuit is proposed in this dissertation to realize the interface 由于mcml电路输出的是小摆幅信号,论文提出了一个三值放大电路,将三值mcml电路的输出进行放大,以便进一步转换,实现和二值信号的接口。
The method and performance according to the requirements are resolved mostly . main contents as follows : ( 1 ) according to the demodulation guideline , a differential detection system is applied to the dpsk signal demodulator , which is based on the analysis and comparison using the principle of optimal binary signal detection 着重解决在皮卫星体积结构,重量和功耗限制条件下的方案选择和性能问题,具体内容包括: ( 1 )对一般二进制信号的最佳检测原理进行分析比较,针对本系统要求选择了dpsk信号差分检测系统的方案。
Due to the multi - carrier transmission technology used in mc - cdma systems , almost all the previous synchronization algorithms in mc - cdma systems are derives from that in ofdm systems . they are suitable for ofdm systems , but they are not optimal for mc - cdma systems . the data symbols transmitted in mc - cdma systems have form of cdma signal , which is greatly different from normal binary signal 传统的各种mc - cdma同步算法主要还是借鉴了ofdm的同步算法,本文提出采用用户扩频码作idft后在fft之前作同步,充分利用了ofdm信号中所包含的mc - cdma信号形式,它与纯粹的ofdm传输的二进制数据不同,它与pn序列具有更好的相关性。
The communication system ' s performance is briefly analyzed by channel capacity , which is a function of bit error rate ( ber ) . the decision rule is based on the most likelihood method . for reproducing the original binary signals more correctly , time scale transformation method and the approach of ensemble average probability of error bits are introduced 通过理论分析和仿真实验,本文研究了这个非线性数字通信系统性能,给出了误码率和信道容量公式,提出了系统参数调节方法,采用最大似然法设计了适合这个系统输出的判决规则。