Transmission modulation apparatus, communication apparatus...

Modulators – Frequency modulator – Including stabilization or alternatively distortion – noise...

Reexamination Certificate

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C332S145000, C332S151000

Reexamination Certificate

active

11352244

ABSTRACT:
Provided is a transmission modulation apparatus, using polar modulation of two-point modulation scheme, capable of completing a timing adjustment of a BB phase modulation signal and BB amplitude modulation signal in a short time. A phase modulation section (10) that performs two-point modulation with a PLL circuit is provided with a switch (17) to make the PLL circuit open loop, and when a first delay section (5) corrects the deviation in synchronization between the BB phase modulation signal and BB amplitude modulation signal, the switch (17) is turned off to make the PLL circuit open loop.

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Peng et al., “A Novel EER Transmitter Using Two-Point Delta-Sigma Modulation Scheme for WLAN and 3G Applications,” IEEE MTT-S (2002), pp. 1651-1654.

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