Radio communication system adapting time division duplexing/frequency hopping

• US 5,970,055 A
• Filed: 08/25/1997
• Issued: 10/19/1999
• Est. Priority Date: 08/24/1996
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Je-Woo, Baek, In-Seen, Park, Jong-Hyeon
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): WOLKOW, FREDERIC D
• Application Number:
  US08/917,062
• Time in Patent Office: 785 Days
• Field of Search: 370/277, 370/280, 370/294, 375/200, 375/202, 714/797, 714/782, 714/784, 714/776
• US Class Current: 370/280
• CPC Class Codes: H04B 1/7136 Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
• CPC Class Codes: H04B 2001/71365 using continuous tuning of a single frequency source
• CPC Class Codes: H04B 7/2615 using hybrid frequency-time division multiple access [FDMA-TDMA]
• CPC Class Codes: H04L 5/1484 operating bytewise

Abstract

A radio communication system adapting TDD/FH, for reducing interference of jammer, preventing third party'"'"'s hearing, and enhancing frequency usage efficiency. The radio communication system adapting time division duplexing/frequency hopping, having: a data source for providing transmission data or receiving input of reception data; a hop frequency generator for generating frequency changed as frequencies preset at every given time; a frequency modulator for modulating frequency according to the transmission frequency corresponding to the hop frequency with provision of the transmission data; a power amplifier for power-amplifying output of the frequency modulator; an antenna for receiving input of a signal outputted from the power amplifier at a regular time period and radiating the inputted signal or receiving reception data; a bandpass filter for bandpass-filtering reception data received from the antenna depending upon the hop frequency; a switch for connecting the antenna with the power amplifier upon transmission and connecting the antenna with the bandpass filter upon reception; a reception frequency mixer for receiving input of the bandpass-filtered reception signal and mixing the received signal with reception frequency corresponding to the hop frequency; an intermediate frequency mixer for receiving output of the reception frequency mixer and mixing the received signal with an intermediate frequency; and a frequency demodulator for receiving output of the intermediate frequency mixer, demodulating frequency, and again inputting the demodulated frequency to the data source.

Claims

1. A radio communication system adapting time division duplexing/frequency hopping, comprising:

a data source for providing transmission data or receiving input of reception data;

a hop frequency generator for generating frequency changed as frequencies preset at every given time;

a frequency modulator for modulating frequency according to the transmission frequency corresponding to said hop frequency with provision of said transmission data;

a power amplifier for power-amplifying output of said frequency modulator;

an antenna for receiving input of a signal outputted from said power amplifier at a regular time period and radiating said inputted signal or receiving reception data;

a bandpass filter for bandpass-filtering reception data received from said antenna depending upon said hop frequency;

a switch for connecting said antenna with said power amplifier upon transmission and connecting said antenna with said bandpass filter upon reception;

a reception frequency mixer for receiving input of said bandpass-filtered reception signal and mixing said received signal with reception frequency corresponding to said hop frequency;

an intermediate frequency mixer for receiving output of said reception frequency mixer and mixing said received signal with an intermediate frequency; and

a frequency demodulator for receiving output of said intermediate frequency mixer, demodulating frequency, and again inputting said demodulated frequency to said data source.

2. The system as recited in claim 1, further comprising:

a frame generator for receiving input of transmission data from said data source, constructing said data with packet, and inputting said data to said frequency modulator; and

a frame restorer for restoring frame with output of said frequency demodulator and inputting said restored frame to said data source.

3. The system as recited in claim 1, wherein said data source is comprised of:

signaling data source for control and signaling data; and

data source for data for voice data and data communication.

4. The system as recited in claim 2, further comprising:

a scrambler for receiving input of transmission data from said data source, scrambling said received data, and providing said scrambled data to said frame generator; and

a descrambler for receiving output of said frame restorer, descrambling said received data, and inputting said descrambled data to said data source.

5. The system as recited in claim 4, further comprising:

a BCH encoder for receiving input of control and signaling data from said signaling data source and BCH-encoding said received data;

a repeating transmitter for receiving output of said BCH encoder and repeatedly transmitting said received data to said scrambler for error correction;

a majority voting unit for majority-voting data in case that data inputted from said descrambler is said control and signaling data; and

a BCH decoder for receiving output of said majority voting unit, BCH-decoding said received data, and inputting said BCH-decoded data to said signaling data source.

6. The system as recited in claim 5, further comprising:

a transmission first-in first-out buffer for receiving input of data from said signaling data source and providing said received data to said BCH encoder; and

a reception first-in first-out buffer for receiving input of data from said BCH decoder and providing said received data to said signaling data source.

7. The system as recited in claim 4, further comprising:

an interleaver for receiving input of data for data communication from data source and interleaving said received data; and

a deinterleaver for deinterleaving said data in the case that data inputted from said descrambler is data for the data communication.

8. The system as recited in claim 7, further comprising:

a transmission first-in first-out buffer for receiving input of data from said data source and directly providing said received data to said interleaver or said scrambler; and

a reception first-in first-out buffer for inputting data from said majority voting unit or receiving data from said descrambler, and providing said received data to said data source.

9. The system as recited in claim 1, further comprising:

a TOD for outputting time information;

a hop pattern generator for receiving input of said data depending on time from said TOD and generating hop pattern;

a hop frequency mapper for receiving input of said hop pattern from said hop pattern generator and mapping said received hop pattern as real frequency;

a time division duplexer controller for generating a time division duplexer state signal;

a transmission frequency combiner for receiving input of frequency from said hop frequency mapper and combining said received frequency with transmission frequency when said time division duplexer state signal is in transmission state; and

a reception frequency combiner for receiving input of frequency from said hop frequency mapper and combining said received frequency with reception frequency when said time division duplexer state signal is in reception state.

10. A radio communication system adapting time division duplexing/frequency hopping, comprising:

means for outputting signaling data;

a BCH encoder for outputting BCH encoded data by BCH encoding said signaling data;

means for outputting voice or data traffic;

first selection means for selectively providing said BCH encoded data, said voice traffic and said data traffic to a scrambler, said scrambler outputting a scrambled signal;

means for buffering said scrambled signal and outputting a data rate converted signal according to a time division duplexing control signal;

means for generating time division duplexing data packets by packet structuring said data rate converted signal into frames of data;

gaussian filter means for filtering said time division duplexing data packets and outputting pulse shaped signals;

frequency modulation means for generating frequency modulated signals by modulating said pulse shaped signals with transmission carrier waves;

means for generating said transmission carrier waves, wherein said transmission carrier waves are produced using a frequency hopping method;

bandpass filter means for outputting a transmission signal filtering and amplifying the frequency modulated signals output from said frequency modulation means; and

second selection means for selectively providing said transmission signal to an antenna in response to said time division duplexing control signal.

11. The radio communication system adapting time division duplexing/frequency hopping as set forth in claim 10, wherein said means for generating said transmission carrier waves comprises:

means for generating timing information;

means for generating a frequency hop pattern in response to said timing information;

means for real frequency mapping of said frequency hop pattern for generating random hop frequencies;

third selection means for selectively providing said hop frequencies to a transmission frequency combiner in response to said time division duplexing control signal; and

said transmission frequency combiner combining a preset transmission frequency with said hop frequencies for output to said frequency modulation means.

12. The radio communication system adapting time division duplexing/frequency hopping as set forth in claim 10, further comprising repeating transmission means for repeatedly transmitting said BCH encoded data to said first selection means.

13. The radio communication system adapting time division duplexing/frequency hopping as set forth in claim 10, further comprising means for providing interleaved data traffic to said first selection means by interleaving said data traffic.

14. The radio communication system adapting time division duplexing/frequency hopping as set forth in claim 10, wherein said means for outputting signaling data comprises a signaling data source for outputting said signaling data and a FIFO for providing said signaling data to said BCH encoder.

15. The radio communication system adapting time division duplexing/frequency hopping as set forth in claim 10, wherein said means for outputting voice or data traffic, a data source for outputting said voice or data traffic and a FIFO for providing said voice or data traffic to said first selection means.

16. The radio communication system adapting time division duplexing/frequency hopping as set forth in claim 10, further comprising:

means for generating timing information;

means for generating a frequency hop pattern in response to said timing information;

means for real frequency mapping of said frequency hop pattern for generating random hop frequencies;

third selection means for selectively providing said hop frequencies to a reception frequency combiner in response to said time division duplexing control signal; and

said reception frequency combiner generating a reception frequency hop signals by combining a preset reception frequency with said hop frequencies.

17. The radio communication system adapting time division duplexing/frequency hopping as set forth in claim 16, further comprising:

variable band pass filtering means responsive to said reception frequency hop signals for passing signals received from said antenna;

first mixing means for generating a down converted signal by mixing output signals passed by said variable band pass filtering means with said reception frequency hop signals;

means for generating a mixed signal by mixing said down converted signal with an intermediate frequency;

frequency demodulator means for generating a baseband signal by FM demodulating said mixed signal;

means for outputting real data by demodulating said baseband signal and deframing said baseband signal;

means for generating received signaling data, voice traffic or data traffic by descrambling said real data;

fourth selection means for selectively outputting said signaling data, voice traffic or data traffic to a BCH decoder or said means for outputting voice or data traffic; and

said BCH decoder for BCH decoding said signaling data for input to said means signaling data.