COGNITIVE UWB SYSTEM AND COGNITIVE UWB DATA COMMUNICATION METHOD

• US 20080212650A1
• Filed: 05/31/2007
• Published: 09/04/2008
• Est. Priority Date: 03/02/2007
• Status: Active Grant

• Current Assignee: INHA Industry Partnership Institute
• Original Assignee: INHA Industry Partnership Institute
• Inventors: Hwang, Jaeho, Kim, JaeMoung
• Granted Patent: US 7,864,830 B2
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: H04B 1/71635 Transmitter aspects H04B1/7174 takes precedence
• CPC Class Codes: H04B 1/7174 Pulse generation in general H04L25/03834
• CPC Class Codes: H04B 1/7183 Synchronisation
• CPC Class Codes: H04B 14/026 using pulse time characteristics modulation, e.g. width, position, interval

Abstract

A cognitive UWB system and a cognitive UWB data communication method. The system includes a cognitive UWB transmitter and a cognitive UWB receiver. The cognitive UWB transmitter includes a channel encoder for correcting error of data, a preamble inserter for inserting a preamble into the data, a mask information inserter for inserting mask information into the data, a cognitive UWB pulse generator for generating a pulse based on the mask information and the channel environment information, a pulse position modulator for modulating the pulse, and a radio frequency transmitter for wirelessly transmitting the data. The cognitive UWB receiver includes a radio frequency receiver for wirelessly receiving data, a synchronizer for synchronizing time of data, a spectrum detector for detecting the channel environment information, a mask information extractor for extracting the mask information, a cognitive UWB pulse generator for generating a pulse, a pulse position modulator for demodulating the pulse, and a channel decoder for correcting error of the demodulated data.

Claims

1. A cognitive UWB system, comprising:

a cognitive UWB transmitter comprising a channel encoder for correcting error of data, a preamble inserter for inserting a preamble for synchronizing time into the data, a mask information inserter for inserting mask information into the data in order to flexibly adapt to different frequency emission regulations, a cognitive pulse generator for generating a pulse based on the mask information and the channel environment information, a pulse position modulator for modulating the pulse based on time variation in position, and a radio frequency transmitter for wirelessly transmitting the data output input from the pulse position modulator; and

a cognitive UWB receiver comprising a radio frequency receiver for wirelessly receiving data, a synchronizer for synchronizing time of the data using the preamble, a spectrum detector for detecting the channel environment information, a mask information extractor for extracting the mask information received from the cognitive UWB transmitter, a cognitive UWB pulse generator for generating a pulse using a frequency band satisfying the frequency emission regulations based on the mask information and the channel environment information, a pulse position modulator for demodulating the pulse, and a channel decoder for correcting error of the demodulated data.

2. The cognitive UWB system as set forth in claim 1, wherein the cognitive UWB pulse generator comprises:

a pulse mask code generator for generating the mask information and the channel environment information, which are respectively adaptive to the frequency emission regulations and the channel environment; and

a basic pulse generator for generating an adaptive pulse, which is adaptive to the frequency emission regulation and the channel environment, using the mask information and the channel environment information.

3. The cognitive UWB system as set forth in claim 2, wherein the pulse mask code generator comprises:

a spectrum detector for detecting and coding channel environment information based on a matched filter technique in sub-frequency bands, divided into a plurality of bands, using a preamble signal for synchronizing time of the signal; and

a mask information inserter for flexibly selecting the input mask information; and

a pulse mask code storage unit for generating and storing pulse mask code information, in which the channel environment and the mask information are combined with each other.

4. The cognitive UWB system as set forth in claim 2, wherein the basic pulse generator comprises:

a frequency generator for generating a center frequency; and

a Sinc window for forming a specific bandwidth for the center frequency input from the frequency generator.

5. An UWB communication method, comprising the steps of:

a cognitive UWB transmitter requesting access to a data transmission link by wirelessly transmitting data, including mask information, to a cognitive UWB receiver so as to access the data transmission link;

the cognitive UWB receiver generating pulse mask code information by combining the mask information of the wirelessly received data and channel environment information of a spectrum detector, generating a pulse corresponding to the mask code information, and wirelessly transmitting the pulse mask code information to the UWB transmitter;

the cognitive UWB receiver transmitting the wirelessly transmitted pulse mask code information via a frequency band that satisfies frequency emission regulations; and

the cognitive UWB receiver wirelessly receiving the data via the frequency band.