Transmitting method and receiving method for simultaneous information and energy transfer

• US 9,641,224 B2
• Filed: 05/31/2016
• Issued: 05/02/2017
• Est. Priority Date: 03/25/2015
• Status: Active Grant

• Current Assignee: South University Of Science And Technology Of China
• Original Assignee: South University Of Science And Technology Of China
• Inventors: Gong, Yi, Zhang, Yue, Han, Zidong
• Primary Examiner(s): HSIEH, PING Y
• Application Number:
  US15/169,302
• Publication Number:
  US 20160285518A1
• Time in Patent Office: 336 Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A transmitting method and receiving method for simultaneous information and energy transfer comprises: determining a first pre-allocated parameter set of a first baseband signal based on a first optimized parameter set and according to a first optimized target and a first constraint condition set; determining a second pre-allocated parameter set of a second baseband signal based on a first optimized result and a second optimized parameter set and according to a second optimized target and a second constraint condition set; and processing the baseband signals into corresponding radio-frequency signals according to the first pre-allocated parameter set and the second pre-allocated parameter set and transmitting the radio-frequency signals through an antenna; the first baseband signal and the second baseband signal each being an information baseband signal or an energy baseband signal. Both the energy transfer efficiency and the information transfer rate are improved by optimizing the information signals and energy signals.

Claims

1. A transmitting method for simultaneous information and energy transfer, applied in a transmitting terminal device, and comprising:

determining, by a transmitting terminal, a first pre-allocated parameter set of a first baseband signal based on a first optimized parameter set and according to a first optimized target and a first constraint condition set;

determining, by the transmitting terminal, a second pre-allocated parameter set of a second baseband signal based on a first optimized result and a second optimized parameter set and according to a second optimized target and a second constraint condition set; and

processing the first baseband signal and the second baseband signal in baseband signals into corresponding radio-frequency signals according to the first pre-allocated parameter set and the second pre-allocated parameter set and transmitting the radio-frequency signals through an antenna;

wherein the first baseband signal and the second baseband signal are each one of an information baseband signal and an energy baseband signal in the baseband signals, and the first baseband signal is different than the second baseband signal.

2. The transmitting method for simultaneous information and energy transfer of claim 1, wherein the transmitting terminal is a multicarrier transmitter, the first baseband signal is an energy baseband signal, and the first optimized target involves minimizing the number of carriers for energy signals and the power of the energy signals in the case that constraint conditions are tenable, and the first constraint condition set comprises:

the power collected by a receiver being greater than or equal to the minimum operating power required by the receiver in a unit time;

the sum power of the energy signals on a sub-carrier being less than or equal to the total power of the energy signals; and

the mean power spectral density over each sub-carrier frequency band being less than or equal to a predetermined parameter value.

3. The transmitting method for simultaneous information and energy transfer of claim 2, wherein the first optimized parameter set comprises one or more of the following parameters:

the minimum operating power required by the receiver;

the channel bandwidth on each sub-carrier;

the mean power spectral density on each sub-carrier; and

a channel parameter vector.

4. The transmitting method for simultaneous information and energy transfer of claim 2, wherein the first pre-allocated parameter comprises one or more of the following parameters:

a sub-carrier allocation set for energy signals;

a power allocation set for energy signals; and

the total power of the energy signals.

5. The transmitting method for simultaneous information and energy transfer of claim 2, wherein the frequency spectrum of the energy signals is spreading and then modulated to a pre-allocated carrier frequency band.

6. The transmitting method for simultaneous information and energy transfer of claim 1, wherein the transmitting terminal is a multicarrier transmitter, and the second baseband signal is an information baseband signal, and the second optimized target involves maximizing the information transfer rate in the case that the second constraint condition set is tenable, and the second constraint condition set comprises:

the sum power of the information signals on a sub-carrier being less than or equal to the total power of the information signals.

7. The transmitting method for simultaneous information and energy transfer of claim 6, wherein the second optimized parameter set comprises one or more of the following parameters:

a sub-carrier set for information signals;

the number of sub-carriers for information signals; and

a channel parameter vector.

8. The transmitting method for simultaneous information and energy transfer of claim 7, wherein the second pre-allocated parameter set comprises one or more of the following parameters:

a power allocation set for information signals; and

a sub-carrier allocation set for information signals.