Open-Loop Wide-Bandwidth Phase Modulation Techniques

الملخص EN

The ever-increasing growth in the bandwidth of wireless communication channels requires the transmitter to be wide-bandwidth and power-efficient.

Polar and outphasing transmitter topologies are two promising candidates for such applications, in future.

Both these architectures require a wide-bandwidth phase modulator.

Open-loop phase modulation presents a viable solution for achieving wide-bandwidth operation.

An overview of prior art and recent approaches for phase modulation is presented in this paper.

Phase quantization noise cancellation was recently introduced to lower the out-of-band noise in a digital phase modulator.

A detailed analysis on the impact of timing and quantization of the cancellation signal is presented.

Noise generated by the transmitter in the receive band frequency poses another challenge for wide-bandwidth transmitter design.

Addition of a noise transfer function notch, in a digital phase modulator, to reduce the noise in the receive band during phase modulation is described in this paper.