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US 11,616,527 B2Granted
Transmitter/receiver and signal generation method
AssigneeHiroshima University
InventorsKyoya Takano, Minoru Fujishima
Life of this patent
Estimating the term…
Abstract
A transmitter/receiver (1) up-converts, using an LO signal as a local oscillation signal, an IF signal having a predetermined frequency band, thereby generating a transmission signal RFTX. Moreover, the transmitter/receiver (1) generates a (LO+IF)2 signal and a (LO−IF)2 signal based on the IF signal and the LO signal. Using the LO signal obtained by adding-up of the (LO+IF)2 signal and the (LO−IF)2 signal, a reception signal RFRX is down-converted. Thus, a local oscillation signal generation unit of a receiving unit is not necessary.
Claims5
A transmitter/receiver comprising:
- a local oscillator configured to up-convert an input signal having a predetermined frequency band to output a local oscillation signal for generating a transmission signal;
- a first adding unit configured to output a signal obtained by adding up of the input signal and the local oscillation signal;
- a first multiplication unit configured to multiply the output signal of the first adding unit;
- a second adding unit configured to output a signal obtained by adding up of an inverted-phase signal of the input signal and the local oscillation signal;
- a second multiplication unit configured to multiply the output signal of the second adding unit;
- an adding/subtraction unit configured to output an addition signal and a subtraction signal generated by adding-up and subtraction of the signal multiplied by the first multiplication unit and the signal multiplied by the second multiplication unit;
- and
- a down conversion mixer configured to down-convert a reception signal received by a receiving antenna by means of the addition signal generated by the adding/subtraction unit.
5 more elements
A signal generation method comprising:
- a first adding step of adding a local oscillation signal to an input signal having a predetermined frequency band;
- a first multiplication step of multiplying the signal obtained by addition at the first adding step;
- a second adding step of adding the local oscillation signal to an inverted-phase signal of the input signal;
- a second multiplication step of multiplying the signal obtained by addition at the second adding step;
- an addition/subtraction step of subtracting the signal multiplied at the second multiplication step from the signal multiplied at the first multiplication step to generate a subtraction signal and adding up the signal multiplied at the first multiplication step and the signal multiplied at the second multiplication step to generate an addition signal;
- and
- a down conversion step of down-converting a reception signal received by a receiving antenna by means of the addition signal.
4 more elements
Dependencies are inferred from the claim text.