包邮数字信号处理——基于计算机德方法(第四版)

table of contents
1 signals and signal processing
　1.1 characterization and classification of signals
　1.2 typical signal processing operations
　1.3 examples of typical signals
　1.4 typical signal processing applications
　1.5 why digital signal processing?
2 discrete-time signals in the time domain
　2.1 time-domain representation
　2.2 operations on sequences
　2.3 operations on finite-length sequences
　2.4 typical sequences and sequence representation
　2.5 the sampling process
　2.6 correlation of signals
　2.7 random signals