Ultrawideband radio transmitter, ultrawideband radio receiver, and ultrawideband radio transmission/reception system

• US 20060062278A1
• Filed: 09/06/2005
• Published: 03/23/2006
• Est. Priority Date: 09/06/2004
• Status: Abandoned Application

• Current Assignee: Ryuji Kohno, Satoru Ishii, Yasutaka Koike
• Original Assignee: Ryuji Kohno, Satoru Ishii, Yasutaka Koike
• Inventors: Kohno, Ryuji, Ishii, Satoru, Koike, Yasutaka
• Application Number:
  US11/219,988
• Publication Number:
  US 20060062278A1
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04B 1/7174 Pulse generation in general H04L25/03834
• CPC Class Codes: H04B 1/7176 Data mapping, e.g. modulation

Abstract

A device is provided that creates pulse signals for UWB with a simplified circuit and performs radio transmission/reception in ultrawideband. The signal processor converts transmission data into a transmission baseband and then transmits it to the Manchester converter circuit. The Manchester converter circuit creates Manchester codes, which are converted from an L level to an H level with bit data [1] of transmission data, or from an H level to an L level with bit data [0] of transmission data. The Manchester converter circuit drives the monopulse generator circuit, using the output monopulse. The monopulse generator circuit includes series resonator circuit, produces a monopulse signal of transient response, which converts from positive to negative or from negative to positive, in response to the edge of the pulse. The enable control circuit selects a monopulse signal to be transmitted and then transmits as an UWB transmission signal the monopulse signal modulated based on the bit data [1], [0], from the antenna A.

Claims

1. An ultrawideband radio transmission/reception system comprising the steps of:

converting transmission digital data into a Manchester code;

driving a series resonator using a pulse signal converted into said Manchester code;

extracting a transient response pulse using an enable pulse signal synchronized with the clock signal of said Manchester code, thus creating a transmission pulse, said transient response pulse being induced at a rising edge and a falling edge of said pulse signal input to said series resonator; and

receiving said transmission pulse by means of receiver means, which is disposed at a spaced position;

whereby said transmission digital data is demodulated.

2. The system as defined in claim 1, wherein said receiver means distributes a received transient response pulse signal to two delay means, each which provides a predetermined delay amount, and demodulates transmission digital data from a combined waveform of output signals from said two delay means.

3. An ultrawideband radio transmitter comprising:

a code converter circuit for converting transmission digital data into a Manchester code;

a series resonator driven with a pulse signal code-converted by said code converter circuit;

enable control means for extracting a transient response pulse signal induced with a rising edge and a falling edge of said pulse signal input to said series resonator, with a clock signal period synchronized with said Manchester code; and

transmission means for transmitting said transient response pulse signal selected by said enable control means.

4. The transmitter as defined in claim 3, wherein said series resonator is formed of a first series resonator and a second series resonator, which are respectively separated by buffer means.

5. An ultrawideband radio receiver comprising:

receiver means for receiving a transient response pulse signal output when a series resonator is driven with a Manchester code;

a signal distribution circuit for supplying a transient response pulse signal received by said receiver means to a first delay circuit and a second delay circuit, said first delay circuit and said second delay circuit each having a delay difference being one half the period of a clock signal for said Manchester code;

a signal creation circuit for combining a difference between an output of said first delay circuit and an output of said second delay circuit;

bit data decision means for deciding the output level of said signal creation circuit; and

pulse signal detector means.

6. The receiver as defined in claim 5, wherein said pulse signal detector means includes a comparison circuit that detects the presence or absence of a monopulse signal received with a threshold level created based on a positive peak voltage and a negative peak voltage of a received transient response pulse signal.