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An FPGA-based all-digital transmitter with 9.6-GHz 2nd order Time-Interleaved ΔΣ-modulation (TI-DSM) is presented. To improve the operation frequency of TI-DSM, bit separation architecture is proposed. This proposed architecture realizes the 1-bit digital transmitter with 500-MHz bandwidth. This is the widest bandwidth modulation among state-of-the-art FPGA-based all-digital transmitters.
An FPGA-based all-digital transmitter with 28-GHz ΔΣ-modulation is presented. For improving the operation frequency of ΔΣ modulator (DSM), a multi-channel look-ahead time-interleaved ΔΣ modulator is proposed. By implementing the proposed DSM in an FPGA, 28-GHz operation of DSM has been achieved. Furthermore, FPGA-based all-digital transmitter integrating the proposed DSM can satisfy the spectral mask...
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