US 2013/0170577 A1Published application

Multimode transmitter apparatus

AssigneePanasonic Corporation

InventorAkihiko Matsuoka

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Abstract

Provided is a multimode transmitter apparatus that, in a case of using different paths to process modulated signals, can suppress the signal overlapping or loss that would occur during a path switching. In the apparatus, a baseband modulating unit (110), which supports a plurality of modulation schemes using different modulation bandwidths, outputs either first modulated signals or second modulated signals. An LPF (130-1) and an LPF (130-2), which have delay amounts Δtd1 and Δtd2, perform signal processings of the first and second modulated signals, respectively. A timing control unit (160) sets the modulation schemes and the switching timings of the modulation schemes. The timing control unit (160) sets, on the basis of the switching timings and the delay amounts Δtd1 and Δtd2, the switching timings of a modulated signal selecting switch (120) and a signal processing delay adjusting switch (140) to be different from each other.

Claims14

Dependent claims

A multimode transmitter apparatus comprising:

a modulating section that is compatible with a plurality of modulation schemes different each other and generates one of a first modulation signal corresponding to a first modulation scheme and a second modulation signal corresponding to a second modulation scheme;
a first signal processing section that has a first delay amount and performs signal processing on the first modulation signal;
a second signal processing section that has a second delay amount larger than the first delay amount and performs signal processing on the second modulation signal;
a transmitting section that transmits the first modulation signal and the second modulation signal, on which the signal processing have been performed;
a first switch that is provided between the modulating section, and the first and the second signal processing sections, and outputs the modulation signal to one of the first and the second signal processing sections;
a second switch that is provided between the first and the second signal processing sections, and the transmitting section, and outputs one of the first modulation signal and the second modulation signal, on which the signal processing has been performed, to the transmitting section;
and
a control section that sets a modulation scheme used for generating the modulation signal in the modulating section, sets switching timing of the first switch based on the first delay amount and the second delay amount, and sets switching timing of the second switch different from the switching timing of the first switch based on at least the switching timing of the first switch and the first delay amount.

5 more elements

A multimode transmitter apparatus comprising:

a modulating section that is compatible with a plurality of modulation schemes different each other and generates a first modulation signal corresponding to a first modulation scheme and a second modulation signal corresponding to a second modulation scheme in parallel, and outputs at least one of the first and the second modulation signals;
a first signal processing section that has a first delay amount and performs signal processing on the first modulation signal;
a second signal processing section that has a second delay amount larger than the first delay amount and performs signal processing on the second modulation signal;
a transmitting section that transmits the first modulation signal and the second modulation signal, on which the signal processing have been performed;
a switch that is provided between the first and the second signal processing sections, and the transmitting section, and outputs one of the first modulation signal and the second modulation signal, on which the signal processing have been performed, to the transmitting section;
and
a control section that sets a modulation scheme used for generating the modulation signal in the modulating section, sets modulation signal output number change timing at which an output of the modulating section is switched from one of the first modulation signal and the second modulation signal to both of the first modulation signal and the second modulation signal based on the first delay amount and the second delay amount, and sets switching timing of the switch based on one of the first delay amount and the second delay amount, and the modulation signal output number change timing.

4 more elements

Dependencies are inferred from the claim text.