US 6,414,986 B1 · Method and system for radio communication

Abstract

In a method for radio communication of exchanging a transmission signal, which has been modulated by a prescribed method based on information data, between plural communication terminals and controlling the plural communication terminals by a control terminal, the control terminal generates a first code sequence to synchronize with the plural communication terminals, and transmits it to the plural communication terminals. The communication terminal synchronizes with the control terminal based on a reference timing obtained by receiving the first code sequence, generates a second code sequence representing the demodulation timing for the transmission signal and transmits it to another communication terminal out of the plural communication terminals, and then transmits the transmission signal to the other communication terminal. The other communication terminal demodulates the transmission signal, which is received following the second code sequence, based on the demodulation timing obtained by receiving the second code sequence.

Claims16

Dependent claims

A radio communication method of exchanging a transmission signal, which has been modulated by a prescribed method based on information data, between plural communication terminals and controlling said plural communication terminals by a control terminal, the radio communication method comprising the steps of:

causing said control terminal to generate a first code sequence to synchronize with said plural communication terminals and transmitting the first code sequence to said plural communication terminals;
synchronizing said communication terminal with said control terminal based on a reference timing obtained by receiving said first code sequence, generating a second code sequence representing the demodulation timing for said transmission signal and transmitting the second code sequence to another communication terminal out of said plural communication terminals, and then transmitting said transmission signal to said other communication terminal after transmitting said second code sequence;
and
causing said other communication terminal to demodulate said transmission signal, received following said second code sequence, based on said demodulation timing obtained by receiving said second code sequence.

1 more element

A radio communication system composed of plural communication terminals that mutually exchange a transmission signal modulated by a prescribed method based on information data and a control terminal for controlling said plural communication terminals,

said control terminal comprising:
first code sequence generating means for generating a first code sequence to synchronize said plural communication terminals;
and
first transmitting means for transmitting said first code sequence to said plural communication terminals;
each of said plural communication terminals comprising:
second code sequence generating means for generating a second code sequence representing a demodulation timing for said transmission signal;
modulating means for generating said transmission signal by performing a predetermined modulating processing based on said information data;
second transmitting means for transmitting said second code sequence and for transmitting said transmission signal following transmitting the second code sequence;
receiving means for receiving said first code sequence, said second code sequence, and said transmission signal;
correlation detecting means for detecting said first code sequence and said second code sequence received by said receiving means;
and
demodulating means for synchronizing with said control terminal based on a reference timing when said correlation detecting means detects said first code sequence, and for demodulating said transmission signal based on said demodulation timing obtained by detecting said second code sequence.

9 more elements

Dependencies are inferred from the claim text.

Method and system for radio communication

Life of this patent

Method and system for radio communication

Life of this patent

Abstract

Claims16