试确定下列周期为4的序列的DFS系数。[tex=12.5x1.357]Fzpu+PbsT0vPvMriZ59by4ViRaBSXhIfwM19N/tDQisXblF2EsgfzNKXWF/PxUwb[/tex]

2022-06-09

试确定下列周期为4的序列的DFS系数。[tex=12.5x1.357]Fzpu+PbsT0vPvMriZ59by4ViRaBSXhIfwM19N/tDQisXblF2EsgfzNKXWF/PxUwb[/tex]

答案：

[tex=8.786x3.429]q/vuAPE6n4RJKSRe2tWCJW9YZPJwZOFxDSDCOl9cgJQqpf0kOdO/uVWtrCoO8bMw[/tex]，写成矩阵形式为[tex=41.143x6.071]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[/tex]

举一反三

内容

0
判断下列各序列是否为周期序列。如果是周期序列，试确定其周期。[tex=8.929x2.786]mE6qgo6iULJ/D8w47ZY9FFE9EdmmOiZYhk+/8nCe2Ow2hTpShKKpP0i43/ytfVTm[/tex]
1
试讨论以下序列的[tex=0.5x0.786]gdMkE6SnyZedYLxpUxdkaQ==[/tex]变换之间的关系。[tex=12.5x1.357]v2g9ABPapa1zPcJHuqjXU56FNQ8D+ML1az6fgHXbvglnw+Bsk3hAIs93qmhqkx5J[/tex]
2
序列x(n)=cos(n*pi3/4)的周期为?
3
已知4点序列x(n)=cos(πn),n=0,1,2,3,该序列的4点DFT为X(k),则X(0)=() A: 0 B: 1 C: 2 D: 4
4
试确定[tex=14.071x2.429]0Zsc3hjtXDhWyBmBRE/fR7Y/t9jNIsoZdgzLMDvjNmBGPsFnrXL+riXmtjU2gTyhIlYAyIQ47BLNfAXIQvJ3Btoh21gbX7P2I86HEqCQrgY=[/tex]离散非周期序列的频谱。