US 8,027,649 B2 · Radio communication system, a transmitter and a receiver

Abstract

In a transmitter 2A, after an output level of a modulated signal is regulated by a first gain regulator 5A, the signal is transmitted from a first antenna 8A without delay, and after the modulated signal is delayed by a delay unit 6A and an output level of the delay output is regulated by a second gain regulator 7A, this signal is transmitted from a second antenna 9A. Similarly, in a transmitter 2B, after an output level of a modulated signal is regulated by a first gain regulator 5B, the signal is transmitted from a first antenna 8B without delay, and after the modulated signal is delayed by a delay unit 6B and an output level of the delay output is regulated by a second gain regulator 7B, this signal is transmitted from a second antenna 9B. A receiver 3 receives the transmitted signals from the four antennas 8A, 8B, 9A and 9B via an antenna 10, and executes a demodulation process.

Claims7

Dependent claims

A transmitter for use with a plurality of transmitters that transmit the same signals with the same frequency band, comprising:

a modulator to modulate signals;
a signal filtering section, coupled to the modulator, to delay the modulated signals, to amplitude regulate the delayed signals and to synthesize the regulated signals with the modulated signals;
and
at least one antenna, coupled to the signal filtering section, to transmit the synthesized signals to a receiver,
wherein at least one of a delay amount and an amplitude regulation value is set differently than respective values in the plurality of transmitters.

2 more elements

Dependencies are inferred from the claim text.

Radio communication system, a transmitter and a receiver

Life of this patent

Radio communication system, a transmitter and a receiver

Life of this patent

Abstract

Claims7