Research Article
Multipath Pipelined Polyphase Structures for FIR Interpolation and Decimation in MIMO OFDM Systems
Table 1
Implementation details and comparison results.
| |
Example |
FIR filter information | Traditional structure | Proposed structure |
Area/stream reduction (%) | | Stream | Area (mm2) | Area/stream | Stream | Area (mm2) | Area/stream |
| | 1 : 2 Interpolation | Raised-cosine | 1 | 0.026 | 0.026 | 2 | 0.039 | 0.0195 | 25% | | 2 : 1 Decimation |
39 tap
| 1 | 0.031 | 0.031 | 2 | 0.049 | 0.0245 | 21% |
| | 1 : 3 Interpolation | Hamming | 1 | 0.066 | 0.066 | 3 | 0.11 | 0.0367 | 45% | | 3 : 1 Decimation |
66 tap
| 1 | 0.093 | 0.093 | 3 | 0.17 | 0.0567 | 39% |
| | 1 : 4 Interpolation | Equiripple
96 tap
| 1 | 0.097 | 0.097 | 4 | 0.17 | 0.0425 | 56% | | 4 : 1 Decimation | | 1 | 0.14 | 0.14 | 4 | 0.31 | 0.0775 | 45% | | | | | | | | |
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