OFDM transceiver apparatus
First Claim
Patent Images
1. An OFDM transmitter apparatus for transmitting signals, which are output from first and second OFDM transmit circuits, utilizing two mutually orthogonal polarized waves, comprising:
- a single carrier wave generator provided in common for the OFDM transmit circuits; and
a frequency converter provided in each OFDM transmit circuit for multiplying a baseband signal by a carrier wave, which is output from said carrier wave generator to convert the baseband signal to a radio signal.
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Abstract
In an OFDM transmitter apparatus for transmitting transmit signals, which are output from first and second OFDM transmit circuits, utilizing two mutually orthogonal polarized waves, a single carrier wave generator is provided in common for the OFDM transmit circuits, and a frequency converter in each OFDM transmit circuit multiplies a baseband signal by a common carrier wave, which is output from the carrier wave generator, to convert the baseband signal to a radio signal.
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Citations
5 Claims
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1. An OFDM transmitter apparatus for transmitting signals, which are output from first and second OFDM transmit circuits, utilizing two mutually orthogonal polarized waves, comprising:
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a single carrier wave generator provided in common for the OFDM transmit circuits; and
a frequency converter provided in each OFDM transmit circuit for multiplying a baseband signal by a carrier wave, which is output from said carrier wave generator to convert the baseband signal to a radio signal.
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2. An OFDM receiver apparatus having first and second OFDM receive circuits for demodulating respective ones of signals that have been transmitted utilizing two mutually orthogonal polarized waves, comprising:
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a single carrier wave generator provided in common for the OFDM receive circuits; and
a frequency converter provided in each OFDM receive circuit for multiplying a radio signal by a carrier wave, which is output from said carrier wave generator to convert the radio signal to a baseband signal, and inputs said baseband signal to a demodulator provided in each OFDM receive circuit. - View Dependent Claims (3, 4)
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5. On OFDM receiver apparatus having first and second OFDM receive circuits for demodulating respective ones of signals that have been transmitted utilizing two mutually orthogonal polarized waves, wherein said OFDM receive circuits include:
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a frequency converter for multiplying a radio signal by a carrier wave to convert the radio signal to a baseband signal;
a demodulator for performing demodulation onto said baseband signal;
an FFT arithmetic unit for applying FFT processing to a demodulated signal;
an error signal generator for generating an error signal based upon each carrier signal obtained by FFT; and
a cross-polarization interference compensating canceller for correcting each carrier signal, that is output from said FFT, by generating a cross-polarization interference compensating signal using said error signal and a demodulated signal of the other OFDM receive circuit.
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Specification