Multiband MIMO-based W-CDMA and UWB communications

• US 7,403,508 B1
• Filed: 09/22/2003
• Issued: 07/22/2008
• Est. Priority Date: 09/22/2003
• Status: Active Grant

• Current Assignee: MIMO Research, LLC
• Original Assignee: George J. Miao
• Inventors: Miao, George J.
• Primary Examiner(s): Rao, Seema S.
• Assistant Examiner(s): DUONG, CHRISTINE T
• Application Number:
  US10/667,039
• Time in Patent Office: 1,765 Days
• Field of Search: 370/334, 370/335, 370/342, 455/552.1, 455/553.1, 455/562.1, 455/575.7, 455/101, 455/102, 455/103, 455/132
• US Class Current: 370/335
• CPC Class Codes: H04B 1/692 Hybrid techniques using combinations of two or more spread spectrum techniques
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04B 2201/7071 with dynamic control of receiver resources
• CPC Class Codes: H04L 27/26265 Arrangements for sidelobes suppression specially adapted to multicarrier systems, e.g. spectral precoding
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/26534 Pulse-shaped multi-carrier, i.e. not using rectangular window

Abstract

This invention presents a system of a multiband MIMO-based W-CDMA and UWB communications for wireless and local area wireless communications. The system includes a W-CDMA base station, an UWB base station, and p-user dual-mode W-CDMA and UWB portable stations. This system allows p-user to transmit and receive a very high-speed multimedia information data based on W-CDMA and UWB communications to access both wireless phones and Internet.

Claims

1. A multiband MIMO-based dual-mode portable communication system has P Wideband Code Division Multiple Access (W-CDMA) and Ultra Wideband (UWB) portable stations having N antennas, a Multiple-Input Multiple-Output (MIMO)-based UWB base station having M antennas, a MIMO-based W-CDMA base station having Q antennas, an UWB multiband, a W-CDMA frequency band, and MIMO channels, where M, N, P, Q, and R are integers and greater than 1, the communication system further comprising:

said MIMO-based W-CDMA base station including a W-CDMA baseband processor unit coupled to a MIMO-based W-CDMA filtering and multicarrier radio frequency (RF) unit that is connected to a W-CDMA control processor unit, which is connected with the W-CDMA baseband processor unit;

said MIMO-based W-CDMA filtering and multicarrier RF unit coupled to the Q antennas;

said W-CDMA baseband processor unit further including two digital filters, two down samplings, a MUX, and a multiband rake receiver and decoder unit;

said MIMO-based UWB base station including an UWB baseband processor unit coupled to a MIMO-based UWB spreading and filtering unit followed by a MIMO-based modulation multicarrier unit that is connected to an UWB control processor unit, which is also connected with the UWB baseband processor unit and the MIMO-based spreading and filtering unit;

said MIMO-based modulation multicarrier unit coupled to the M antennas;

each of said P W-CDMA and UWB portable stations including a MIMO-based dual-mode W-CDMA and UWB filtering and multicarrier unit, a W-CDMA mobile baseband processor unit, an UWB OFDM multiband baseband processor unit, a W-CDMA and UWB OFDM multiband control processor unit, and a sharing memory bank unit;

said MIMO-based dual-mode W-CDMA and UWB filtering and multicarrier unit further including two low noise amplifiers followed by two automatic gain controllers coupled to two analog bandpass filters connected to two dual-switch units, one of said two dual-switch units coupled to a W-CDMA down converter and demodulation and another of said two dual-switch units coupled to an UWB multiband down converter and demodulation, and both of said W-CDMA down converter and demodulation and said UWB multiband down converter and demodulation coupled to an analog-to-digital (A/D) converter unit;

said A/D converter unit having two switch units that are controllable, each of the two switch units having two inputs and one output, and 8 A/D converters; and

said MIMO-based dual-mode W-CDMA and UWB filtering and multicarrier unit coupled to the N antennas.

2. The multiband MIMO-based dual-mode portable communication system of claim 1 wherein each of said two dual-switch units having two internal switches is controlled by said W-CDMA and UWB OFDM multiband control processor unit to provide information from the two analog bandpass filters either to the W-CDMA down converter and demodulation or to the UWB multiband down converter and demodulation.

3. The multiband MIMO-based dual-mode portable communication system of claim 2 wherein said one of the two dual-switch units coupled to the W-CDMA down converter and demodulation is used during a W-CDMA operation or said another of the two dual-switch units coupled to the UWB multiband down converter and demodulation is used during an UWB operation.

4. The multiband MIMO-based dual-mode portable communication system of claim 1 wherein said UWB multiband has four UWB frequency bands within a frequency range from greater than 3.1 GHz to less than 5.15 GHz, each of the four UWB frequency bands having approximate 512 MHz with a magnitude below −

41.3 dBm.

5. The multiband MIMO-based dual-mode portable communication system of claim 4 wherein said P W-CDMA and UWB portable stations uses any one of said four UWB frequency bands or any combination of said four UWB frequency bands during the UWB operation.

6. The multiband MIMO-based dual-mode portable communication system of claim 1 wherein said eight A/D converters has the same sampling rate and bit resolution, two of the eight A/D converters coupled to the two switch units that are controllable.

7. The multiband MIMO-based dual-mode portable communication system of claim 6 wherein said two switch units connect either two W-CDMA input signals or two UWB input signals.

8. The multiband MIMO-based dual-mode portable communication system of claim 6 wherein said only two of the eight A/D converters operate in parallel during a W-CDMA receiver mode.

9. The multiband MIMO-based dual-mode portable communication system of claim 7 wherein said eight A/D converters operate in parallel and said two switch units that are coupled to two of the eight A/D converters connect to the two UWB input signals during an UWB receiver mode.

10. The multiband MIMO-based dual-mode portable communication system of claim 1 wherein said multiband rake receiver and decoder unit further includes twelve complex modulations, twelve digital filters, twelve despreaders and rake units, a MUX, a long code user-p mask, a long code generator, a XOR, a deinterleaver, a desymbol repetition, and a decoder.

11. The multiband MIMO-based dual-mode portable communication system of claim 1 wherein said UWB OFDM multiband baseband processor unit further includes a combination section of a digital receiver filter unit, a multiband dispreading unit, and a time-domain equalizer (TEQ) unit, four serial-to-parallel (S/P), four guard removing, four combinations of fast Fourier transform (FFT) and frequency-domain equalizer (FEQ), five parallel-to-serial (P/S), and a despreading, deinterleaver and decoding unit.

12. The multiband MIMO-based dual-mode portable communication system of claim 11 wherein said combination section of the digital receiver filter unit, the multiband dispreading unit, and the TEQ unit further contains eight digital receiver filters, eight-XOR, four-multiband-despreading, four-MUX, and four-TEQ.

13. The multiband MIMO-based dual-mode portable communication system of claim 11 wherein each of the four combinations of the FFT and the FEQ further includes a FFT having 1024 inputs, 512 outputs and 512 disable outputs, 500 of the 512 outputs are connected to 500 N-tap equalizers followed by 500 decision detector units, and an adaptive algorithm, which is used to update the 500 N-tap equalizers.

14. A dual-mode Wideband Code Division Multiple Access (W-CDMA) and Ultra-Wideband (UWB) communication receiver comprising:

two antennas coupled to a Multiple-Input-Multiple-Output (MIMO)-based dual-mode W-CDMA and UWB filtering and multicarrier radio frequency (RF) section;

the MIMO-based dual-mode W-CDMA and UWB filtering and multicarrier RF section are connected to a W-CDMA baseband processor, an UWB OFDM multiband baseband processor, and a W-CDMA and UWB Orthogonal Frequency Division Multiplexing (OFDM) multiband control processor;

the W-CDMA and UWB OFDM multiband control processor coupled to the W-CDMA baseband processor, the UWB OFDM multiband baseband processor, and a sharing memory bank;

the sharing memory bank also coupled to the W-CDMA baseband processor, and the UWB OFDM multiband baseband processor;

the UWB OFDM multiband baseband processor using an UWB multiband;

the UWB multiband having four frequency bands within the frequency range from greater than 3.1 GHz to less than 5.15 GHz and a magnitude below −

41.3 dBm;

the MIMO-based dual-mode W-CDMA and UWB filtering and multicarrier RF section further including two low noise amplifiers, two automatic gain controllers, two analog bandpass filters, two dual-switch units, a W-CDMA down converter and demodulation, an UWB multiband down converter and demodulation, and an analog-to-digital (A/D) converter unit; and

the A/D converter unit having the same type of eight A/D converters that can operate at a sampling rate of 540 MHz.

15. The dual-mode W-CDMA and UWB communication receiver of claim 14 wherein said UWB OFDM multiband baseband processor deals with four UWB-OFDM frequency bands, with each frequency band having 512 MHz approximately.

16. The dual-mode W-CDMA and UWB communication receiver of claim 14 wherein only two among the eight A/D converters are operated producing an oversampling rate of 36 times for W-CDMA input signals.

17. The dual-mode W-CDMA and UWB communication receiver of claim 14 wherein eight A/D converters are operated in parallel for UWB input signals, each A/D converter having a 540-MHz sampling rate.