| 摘要 |
<p>A configurable multi-rate channelizer (20) is provided to separate an input bandwidth into a plurality of narrowband channels at different data rates, such as 1x, 2x and 4x. The innovative multi-rate channelizer design may contain the same hardware blocks, such as the window presum block 22, the cyclic shift block 24 and the discrete Fourier transform (DFT) block 26 for channelizing both real and complex representations of an input wideband signal into individual channels. However, only some of these hardware blocks may be used while some other hardware blocks may be bypassed depending on the output data rate chosen for an input wideband signal with minimal additional hardware for reconfiguration. For the 1x data rate, all hardware blocks may be used to channelize an input wideband signal into four (4) channels at 1x data rate. For the 2x data rate, most hardware blocks except for a 2-point DFT of the DFT block 26 may be used to channelize an input wideband signal into two (2) channels at 2x data rate. For the 4x data rate, only the window presum block 22 and the 2-point DFT of the DFT block 26 may be used as first and final stages of accumulation for an integrate and dump operation. This way a single channelizer may be reusable for multiple applications while realizing design gate savings. <IMAGE></p> |
