Transmitting Circuit, Transceiver, Communication System, and Method for Transmitting Data

• US 20150139348A1
• Filed: 01/30/2015
• Published: 05/21/2015
• Est. Priority Date: 07/30/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Tong, Wen, Huang, Huang, Yan, Xi, Wang, Guangjian, Liu, Kunpeng
• Granted Patent: US 9,712,363 B2
• Time in Patent Office: Days
• US Class Current: 375/267
• CPC Class Codes: H04B 1/0007 wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
• CPC Class Codes: H04B 1/0053 with common antenna for more than one band
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2649 Demodulators

Abstract

A transmitting circuit, a transceiver, a communication system, and a method for transmitting data. The transmitting circuit includes a digital interface circuit configured to obtain, in a predetermined bandwidth, data to be sent, and decompose the data into N parallel sub digital signal flows; a digital modulation circuit configured to modulate the N sub digital signal flows to obtain N modulated signals; a frequency relocation circuit configured to perform frequency relocation on the N modulated signals; a synthesizer configured to modulate M modulated signals of the N modulated signals that have undergone frequency relocation into a bandwidth signal; a digital to analog converter configured to receive the bandwidth signal, and perform digital to analog conversion on the bandwidth signal to obtain an analog signal; an up-conversion circuit configured to receive the analog signal, and convert the analog signal into a radio frequency signal.

Claims

1. A transmitting circuit comprising:

a digital interface circuit configured to;

obtain, in a predetermined bandwidth, first data to be sent; and

decompose the first data into N parallel first sub digital signal flows, wherein a bandwidth occupied by each first sub digital signal flow of the N first sub digital signal flows is smaller than the predetermined bandwidth, and wherein N is a positive integer greater than 1;

a digital modulation circuit configured to;

receive the N first sub digital signal flows; and

modulate the N first sub digital signal flows to obtain N first modulated signals;

a first frequency relocation circuit configured to;

receive the N first modulated signals; and

perform frequency relocation on the N first modulated signals so that there is no frequency band gap between adjacent first modulated signals of the N first modulated signals that have undergone frequency relocation;

a first synthesizer configured to synthesize M first modulated signals of the N first modulated signals that have undergone frequency relocation into a first bandwidth signal, wherein M is a positive integer smaller than or equal to N;

a first digital to analog converter configured to;

receive the first bandwidth signal; and

perform digital to analog conversion on the first bandwidth signal to obtain a first analog signal; and

a first up-conversion circuit configured to;

receive the first analog signal; and

convert the first analog signal into a radio frequency signal so that the radio frequency signal is sent by an antenna.

2. The transmitting circuit according to claim 1 further comprising:

a second synthesizer configured to synthesize L first modulated signals of the N first modulated signals that have undergone frequency relocation into a second bandwidth signal, wherein the L first modulated signals are different from the M first modulated signals, wherein L is a positive integer, and wherein a sum of L and M is smaller than or equal to N; and

a second digital to analog converter configured to;

receive the second bandwidth signal; and

perform digital to analog conversion on the second bandwidth signal to obtain a second analog signal, and wherein the up-conversion circuit is configured to receive the first analog signal and the second analog signal, and synthesize the first analog signal and the second analog signal into the radio frequency signal.

3. The transmitting circuit according to claim 2, wherein the up-conversion circuit is further configured to perform frequency relocation on the first analog signal and the second analog signal respectively before synthesizing the first analog signal and the second analog signal into the radio frequency signal.

4. The transmitting circuit according to claim 1, wherein the digital interface circuit is further configured to obtain, in the predetermined bandwidth, second data to be sent, and decompose the second data into N parallel second sub digital signal flows, wherein a bandwidth occupied by each second sub digital signal flow of the N second sub digital signal flows is smaller than the predetermined bandwidth, wherein the digital modulation circuit is further configured to receive the N second sub digital signal flows, and modulate the N second sub digital signal flows to obtain N second modulated signals, and wherein the transmitting circuit further comprises:

a second frequency relocation circuit configured to;

receive the N second modulated signals; and

perform frequency relocation on the N second modulated signals, wherein there is no frequency band gap between adjacent second modulated signals of the N second modulated signals that have undergone frequency relocation;

a second synthesizer configured to synthesize P signals of the N second modulated signals that have undergone frequency relocation into a second bandwidth signal, wherein P is a positive integer smaller than or equal to N;

a second digital to analog converter configured to;

receive the second bandwidth signal; and

perform digital to analog conversion on the second bandwidth signal to obtain a second analog signal, wherein the first up-conversion circuit is further configured to;

receive the first analog signal; and

convert the first analog signal into a first radio frequency signal, so that the first radio frequency signal is sent by a first antenna; and

a second up-conversion circuit, wherein the second up-conversion circuit is configured to;

receive the second analog signal; and

convert the second analog signal into a second radio frequency signal so that the second radio frequency signal is sent by a second antenna.

5. The transmitting circuit according to claim 4, wherein the digital modulation circuit comprises N modulators, wherein the N modulators modulate the N first sub digital signal flows respectively, and wherein the N modulators are further configured to modulate the N second sub digital signal flows.

6. The transmitting circuit according to claim 1, wherein the antenna is a dual-polarized antenna, wherein the dual-polarized antenna comprises an H-polarized antenna and a V-polarized antenna, wherein the digital interface circuit is further configured to:

obtain, in the predetermined bandwidth, second data to be sent; and

decompose the second data into K parallel second sub digital signal flows, wherein a bandwidth occupied by each second sub digital signal flow of the K second sub digital signal flows is smaller than the predetermined bandwidth and K is a positive integer, and wherein the transmitting circuit further comprises;

a second digital modulation circuit configured to;

receive the K second sub digital signal flows; and

modulate the K second sub digital signal flows on the V-polarized antenna to obtain K second modulated signals, wherein K is a positive integer greater than 1;

a second frequency relocation circuit configured to;

receive the K second modulated signals; and

perform frequency relocation on the K second modulated signals, wherein there is no frequency band gap between adjacent second modulated signals of the K second modulated signals that have undergone frequency relocation;

a second synthesizer configured to synthesize at least two signals of the K second modulated signals that have undergone frequency relocation into a second bandwidth signal;

a second digital to analog converter configured to;

receive the second bandwidth signal; and

perform digital to analog conversion on the second bandwidth signal to obtain a second analog signal;

a second up-conversion circuit configured to;

receive the second analog signal; and

convert the second analog signal into a second radio frequency signal; and

a coupler configured to couple the first radio frequency signal and the second radio frequency signal so that the first radio frequency signal and the second radio frequency signal are sent by the dual-polarized antenna respectively, and wherein the first radio frequency signal is sent by the H-polarized antenna and the second radio frequency signal is sent by the V-polarized antenna.

7. The transmitting circuit according to claim 6, wherein the digital modulation circuit comprises N+K modulators, wherein the N modulators modulate the N first sub digital signal flows respectively, and wherein the K modulators modulate the K second sub digital signal flows respectively.

8. The transmitting circuit according to claim 1, wherein the first synthesizer comprises an adder, wherein the adder is configured to add the N first modulated signals that have undergone frequency relocation to synthesize the N first modulated signals into a first bandwidth signal.

9. The transmitting circuit according to claim 1, wherein N is at least 4 and the first data is at least one binary digital signal flow.

10. A transceiver comprising a receiving circuit and a transmitting circuit, wherein the transmitting circuit comprises:

a digital interface circuit configured to;

obtain, in a predetermined bandwidth, first data to be sent; and

decompose the first data into N parallel first sub digital signal flows, wherein a bandwidth occupied by each first sub digital signal flow of the N first sub digital signal flows is smaller than the predetermined bandwidth, and wherein N is a positive integer greater than 1;

a digital modulation circuit configured to receive the N first sub digital signal flows, and modulate the N first sub digital signal flows to obtain N first modulated signals;

a first frequency relocation circuit configured to;

receive the N first modulated signals; and

perform frequency relocation on the N first modulated signals, so that there is no frequency band gap between adjacent first modulated signals of the N first modulated signals that have undergone frequency relocation;

a first synthesizer configured to synthesize M first modulated signals of the N first modulated signals that have undergone frequency relocation into a first bandwidth signal, wherein M is a positive integer smaller than or equal to N;

a first digital to analog converter configured to;

receive the first bandwidth signal, and

perform digital to analog conversion on the first bandwidth signal to obtain a first analog signal; and

a first up-conversion circuit configured to;

receive the first analog signal; and

convert the first analog signal into a radio frequency signal, so that the radio frequency signal is sent by an antenna, and

wherein the receiving circuit comprises;

a down-conversion circuit configured to convert a radio frequency signal received on a receiving antenna into an analog signal;

an intermediate frequency power divider configured to decompose the analog signal into Q parallel sub analog signal flows;

a second frequency relocation circuit configured to perform frequency relocation on the Q parallel sub analog signal flows;

N analog to digital converters configured to perform analog to digital conversion on the Q parallel sub analog signal flows respectively to obtain N parallel digital signal flows;

a digital demodulation circuit configured to perform demodulation processing on the Q parallel digital signal flows to obtain Q parallel demodulated signals; and

a digital interface circuit configured to synthesize the Q parallel demodulated signals into second data.

11. A communication system comprising a transmitter and a receiver, wherein the transmitter comprises:

a digital interface circuit configured to;

obtain, in a predetermined bandwidth, first data to be sent; and

decompose the first data into N parallel first sub digital signal flows, wherein a bandwidth occupied by each first sub digital signal flow of the N first sub digital signal flows is smaller than the predetermined bandwidth, and wherein N is a positive integer greater than 1;

a first digital modulation circuit configured to;

receive the N first sub digital signal flows; and

modulate the N first sub digital signal flows to obtain N first modulated signals;

a first frequency relocation circuit configured to;

receive the N first modulated signals; and

perform frequency relocation on the N first modulated signals so that there is no frequency band gap between adjacent first modulated signals of the N first modulated signals that have undergone frequency relocation;

a first synthesizer configured to synthesize M first modulated signals of the N first modulated signals that have undergone frequency relocation into a first bandwidth signal, wherein M is a positive integer smaller than or equal to N;

a first digital to analog converter configured to;

receive the first bandwidth signal; and

perform digital to analog conversion on the first bandwidth signal to obtain a first analog signal;

a first up-conversion circuit configured to;

receive the first analog signal; and

convert the first analog signal into a first radio frequency signal so that the first radio frequency signal is sent by a first antenna;

a second synthesizer configured to synthesize L first modulated signals of the N first modulated signals that have undergone frequency relocation into a second bandwidth signal, wherein the L first modulated signals are different from the M first modulated signals, wherein L is a positive integer, and wherein a sum of L and M is smaller than or equal to N; and

a second digital to analog converter configured to;

receive the second bandwidth signal; and

perform digital to analog conversion on the second bandwidth signal to obtain a second analog signal, wherein the first up-conversion circuit is configured to;

receive the first analog signal and the second analog signal;

synthesize the first analog signal and the second analog signal into the radio frequency signal; and

perform frequency relocation on the first analog signal and the second analog signal respectively before synthesizing the first analog signal and the second analog signal into the first radio frequency signal;

a second frequency relocation circuit configured to;

receive the N second modulated signals; and

perform frequency relocation on the N second modulated signals, wherein there is no frequency band gap between adjacent second modulated signals of the N second modulated signals that have undergone frequency relocation;

a third synthesizer configured to synthesize P signals of the N second modulated signals that have undergone frequency relocation into a third bandwidth signal, wherein P is a positive integer smaller than or equal to N;

a third digital to analog converter configured to;

receive the third bandwidth signal; and

perform digital to analog conversion on the third bandwidth signal to obtain a second analog signal;

a second up-conversion circuit, wherein the second up-conversion circuit is configured to;

receive the third analog signal; and

convert the third analog signal into a second radio frequency signal so that the second radio frequency signal is sent by a second antenna, wherein the digital modulation circuit comprises N modulators, wherein the N modulators modulate the N first sub digital signal flows respectively, and wherein the N modulators are further configured to modulate the N second sub digital signal flows;

a second digital modulation circuit configured to;

receive the K second sub digital signal flows; and

modulate the K second sub digital signal flows on the V-polarized antenna to obtain K second modulated signals, wherein K is a positive integer greater than 1;

a third frequency relocation circuit configured to;

receive the K second modulated signals; and

perform frequency relocation on the K second modulated signals, wherein there is no frequency band gap between adjacent second modulated signals of the K second modulated signals that have undergone frequency relocation;

a fourth synthesizer configured to synthesize at least two signals of the K second modulated signals that have undergone frequency relocation into a second bandwidth signal;

a fourth digital to analog converter configured to;

receive the third bandwidth signal; and

perform digital to analog conversion on the third bandwidth signal to obtain the third analog signal;

a third up-conversion circuit configured to;

receive the third analog signal; and

convert the third analog signal into a third radio frequency signal; and

a coupler configured to couple the first radio frequency signal and the second radio frequency signal so that the first radio frequency signal and the second radio frequency signal are sent by the dual-polarized antenna respectively, wherein the first radio frequency signal is sent by the H-polarized antenna and the second radio frequency signal is sent by the V-polarized antenna, wherein the receiver comprises;

a down-conversion circuit configured to convert a radio frequency signal received on a receiving antenna into an analog signal;

an intermediate frequency power divider configured to decompose the analog signal into N parallel sub analog signal flows;

a second frequency relocation circuit configured to perform frequency relocation on the N parallel sub analog signal flows;

N analog to digital converters configured to perform analog to digital conversion on the N parallel sub analog signal flows respectively to obtain N parallel digital signal flows;

a digital demodulation circuit configured to perform demodulation processing on the N parallel digital signal flows to obtain N parallel demodulated signals; and

a digital interface circuit configured to synthesize the N parallel demodulated signals into first data.

12. A method for transmitting data comprising:

obtaining, in a predetermined bandwidth, first data to be sent;

decomposing the first data into N parallel first sub digital signal flows, wherein a bandwidth occupied by each first sub digital signal flow of the N first sub digital signal flows is smaller than the predetermined bandwidth and N is a positive integer greater than 1;

modulating the N first sub digital signal flows to obtain N first modulated signals;

performing frequency relocation on the N first modulated signals so that there is no frequency band gap between adjacent first modulated signals of the N first modulated signals that have undergone frequency relocation;

synthesizing M first modulated signals of the N first modulated signals that have undergone frequency relocation into a first bandwidth signal, wherein M is a positive integer smaller than or equal to N;

performing digital to analog conversion on the first bandwidth signal to obtain a first analog signal; and

converting the first analog signal into a radio frequency signal, so that the radio frequency signal is sent by an antenna.

13. The method according to claim 12, further comprising:

synthesizing L first modulated signals of the N first modulated signals that have undergone frequency relocation into a second bandwidth signal, wherein the L first modulated signals are different from the M first modulated signals, wherein L is a positive integer, and wherein a sum of L and M is smaller than or equal to N;

performing digital to analog conversion on the second bandwidth signal to obtain a second analog signal; and

synthesizing the first analog signal and the second analog signal into the radio frequency signal.

14. The method according to claim 13, further comprising performing frequency relocation on the first analog signal and the second analog signal respectively before synthesizing the first analog signal and the second analog signal into the radio frequency signal.

15. The method according to claim 12, further comprising:

obtaining, in the predetermined bandwidth, second data to be sent;

decomposing the second data into N parallel second sub digital signal flows, wherein a bandwidth occupied by each second sub digital signal flow of the N second sub digital signal flows is smaller than the predetermined bandwidth;

modulating the N second sub digital signal flows to obtain N second modulated signals;

performing frequency relocation on the N second modulated signals so that there is no frequency band gap between adjacent second modulated signals of the N second modulated signals that have undergone frequency relocation;

synthesizing P signals of the N second modulated signals that have undergone frequency relocation into a second bandwidth signal, wherein P is a positive integer smaller than or equal to N;

performing digital to analog conversion on the second bandwidth signal to obtain a second analog signal; and

converting the second analog signal into a second radio frequency signal so that the second radio frequency signal is sent by a second antenna.

16. The method according to claim 15, wherein modulating the N first sub digital signal flows comprises modulating the N first sub digital signal flows respectively using N modulators, and wherein modulating the N second sub digital signal flows comprises modulating the N second sub digital signal flows respectively using the N modulators.

17. The method according to claim 14, wherein the antenna is a dual-polarized antenna, wherein the dual-polarized antenna comprises an H-polarized antenna and a V-polarized antenna the modulating N first sub digital signal flows, wherein the method further comprises:

obtaining, in the predetermined bandwidth, second data to be sent;

decomposing the second data into K parallel second sub digital signal flows, wherein a bandwidth occupied by each second sub digital signal flow of the K second sub digital signal flows is smaller than the predetermined bandwidth and K is a positive integer greater than 1;

modulating the K second sub digital signal flows on the V-polarized antenna to obtain K second modulated signals;

performing frequency relocation on the K second modulated signals, wherein there is no frequency band gap between adjacent second modulated signals of the K second modulated signals that have undergone frequency relocation;

synthesizing at least two signals of the K second modulated signals that have undergone frequency relocation into a second bandwidth signal;

performing digital to analog conversion on the second bandwidth signal to obtain a second analog signal;

receiving the second analog signal, and converting the second analog signal into a second radio frequency signal; and

coupling the first radio frequency signal and the second radio frequency signal, so that the first radio frequency signal and the second radio frequency signal are sent by the dual-polarized antenna respectively, and wherein the first radio frequency signal is sent by the H-polarized antenna and the second radio frequency signal is sent by the V-polarized antenna.

18. The method according to claim 17, wherein the modulating the N first sub digital signal flows comprises modulating the N first sub digital signal flows respectively using N modulators, and wherein the modulating the K second sub digital signal flows comprises modulating the K second sub digital signal flows respectively using K modulators.

19. The method according to claim 14, wherein the synthesizing M first modulated signals of the N first modulated signals that have undergone frequency relocation into a first bandwidth signal comprises adding, using an adder, the N first modulated signals that have undergone frequency relocation to synthesize the N first modulated signals into a first bandwidth signal.

20. The method according to claim 14, wherein N is at least 4 and the first data is at least one binary digital signal flow.