MULTIPLE-INPUT-MULTIPLE-OUTPUT WIRELESS TRANSMISSION SYSTEM AND TRANSMISSION METHOD THEREOF

• US 20080292009A1
• Filed: 07/11/2007
• Published: 11/27/2008
• Est. Priority Date: 05/24/2007
• Status: Abandoned Application

• Current Assignee: Chung-Shan Institute of Science & Technology Armaments Bureau MND (Government of The Republic of China)
• Original Assignee: Chung-Shan Institute of Science & Technology Armaments Bureau MND (Government of The Republic of China)
• Inventors: Deng, Juinn-Hurng, Hwang, Jeng-Kuang, Chuang, Yu-Min
• Application Number:
  US11/776,000
• Publication Number:
  US 20080292009A1
• Time in Patent Office: Days
• US Class Current: 375/260
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

The present invention relates to a multiple-input-multiple-output (MIMO) wireless transmission system and a transmission method thereof. A wireless transmitting system thereof receives encoded data via a first processing unit, which processes the encoded data and outputs the encoded data to a plurality of modulation units for modulating the encoded data to produce a plurality of modulated data. A plurality of first conversion units converts the plurality of modulated data to a plurality of transmitting signals. A plurality of radio-frequency (RF) circuits receives the plurality of transmitting signals and transmits RF signals according to the frequency-hopping sequence of a piconet. A plurality of receiving processing units of a wireless receiving system according to the present invention receives the RF signals, respectively, according to the frequency-hopping sequence of the piconet and transmits to a plurality of second conversion units for converting the RF signals to received data. A switching circuit switches the received data according to the frequency-hopping sequence of the piconet. A plurality of demodulation units demodulates the switched received data to produce demodulated data. A second processing unit received the demodulated data, and processes the demodulated data to output demodulated data. A decoding unit decodes the demodulated data output by the second processing unit to produce output data.

Claims

1. A multiple-input-multiple-output (MIMO) wireless transmission system, comprising:

a wireless transmitting system, comprising;

an encoding unit, receiving input data, and encoding the input data to produce encoded data;

a first processing unit, receiving the encoded data, processing the encoded data, and outputting the encoded data;

a plurality of modulation units, receiving the encoded data output by the first processing unit, and modulating the encoded data to produce a plurality of modulated data;

a plurality of first conversion units, coupling to the plurality of modulation units, respectively, receiving the plurality of modulated data, and converting the plurality of modulated data to a plurality of transmitting signals; and

a plurality of radio-frequency (RF) circuits, coupling to the plurality of first conversion units, respectively, receiving the plurality of transmitting signals, converting the plurality of transmitting signals to a plurality of RF signals, and transmitting the RF signals according to the frequency-hopping sequence of a piconet, respectively;

a wireless receiving system, comprising;

a plurality of receiving processing units, receiving the RF signals according to the frequency-hopping sequence of the piconet of the plurality of RF circuits, respectively;

a plurality of second conversion units, coupling to the plurality of receiving processing units, respectively, receiving the RF signals, and converting the RF signals to received data;

a switching circuit, switching the received data;

a plurality of demodulation units, receiving the received data switched by the switching circuit, and demodulating the received data to produce demodulated data;

a second processing unit, receiving the demodulated data, and processing the demodulated data to output the demodulated data; and

a decoding unit, decoding the demodulated data output by the second processing unit to produce output data.

2. The wireless transmission system of claim 1, wherein the first processing unit adopts spatial multiplexing to process the encoded data and outputs the encoded data.

3. The wireless transmission system of claim 2, wherein the first processing unit is a demultiplexer, which adopts spatial multiplexing to process the encoded data and outputs the encoded data.

4. The wireless transmission system of claim 2, wherein when the first processing unit processes the encoded data using spatial multiplexing, the plurality of RF circuits transmits switchingly the RF signals to the plurality of receiving processing units according to the different bands of the frequency-hopping sequence of the piconet, respectively.

5. The wireless transmission system of claim 2, wherein the second processing unit is a multiplexer, which restores spatial multiplexing and processes the demodulated data to output the demodulated data.

6. The wireless transmission system of claim 1, wherein the first processing unit adopts the spatial reuse process to process the encoded data and outputs the encoded data.

7. The wireless transmission system of claim 6, wherein the first processing unit transmits simultaneously the encoded data to the plurality of modulation units, processes the encoded data with the spatial reuse method, and outputs the encoded data.

8. The wireless transmission system of claim 6, wherein when the first processing unit processes the encoded data with the spatial reuse method, the plurality of RF circuits transmits in parallel the RF signals to the plurality of receiving processing unit in the same band.

9. The wireless transmission system of claim 6, wherein the second processing unit is a synthesis unit, which restores the spatial reuse process and processes the demodulated data to output the demodulated data.

10. The wireless transmission system of claim 1, wherein the first processing unit further receives a selection signal, processes the encoded data using the spatial multiplexing or the spatial reuse method, and outputs the encoded data.

11. The wireless transmission system of claim 8, wherein the selection signal is a selection signal of a piconet.

12. The wireless transmission system of claim 1, wherein the first conversion unit is a digital-to-analog converter for converting the digital modulated data to the analog RF signals.

13. The wireless transmission system of claim 1, wherein the plurality of RF circuits further includes a transmitting antenna for transmitting the RF signals to the wireless receiving system.

14. The wireless transmission system of claim 1, wherein the modulation units are orthogonal frequency-division multiplexing (OFDM) modulation units.

15. The wireless transmission system of claim 1, wherein the switching circuit switches the received data to the plurality of modulated units corresponding to the plurality of RF circuits according to the RF signals transmitted by the plurality of RF circuits of the wireless transmitting system for demodulating the received data.

16. The wireless transmission system of claim 1, wherein the plurality of receiving processing units further includes a plurality of receiving antennas, coupling to the plurality of receiving processing units, respectively, for receiving the RF signals and transmitting to the plurality of receiving processing units.

17. The wireless transmission system of claim 1, wherein the second conversion unit is an analog-to-digital converter for converting the analog RF signals to the digital received data.

18. The wireless transmission system of claim 1, wherein the demodulation units are orthogonal frequency-division multiplexing (OFDM) demodulation units.

19. A method for multiple-input-multiple-output (MIMO) wireless transmission, comprising the steps of:

encoding input data to produce encoded data;

receiving the encoded data, processing the encoded data, and outputting the encoded data;

receiving the processed encoded data, and modulating the encoded data to produce a plurality of modulated data;

receiving the plurality of modulated data, and converting the plurality of modulated data to a plurality of transmitting signals;

receiving the plurality of transmitting signals, converting the plurality of transmitting signals to a plurality of RF signals, and transmitting the RF signals according to the frequency-hopping sequence of a piconet, respectively;

receiving the RF signals according to the frequency-hopping sequence of the piconet, respectively;

converting the RF signals to received data;

switching the received data according to a selection signal;

receiving the switched received data, and demodulating the received data to produce demodulated data;

receiving the demodulated data, and processing the demodulated data to output the demodulated data; and

decoding the converted demodulated data to produce output data.