Signal transmission and receiving method, system and apparatus based on filter bank

Patent metadata

Field	Value
Publication number	US-2016204822-A1
Application number	US-201614994021-A
Country	US
Kind code	A1
Filing date	Jan 12, 2016
Priority date	Jan 12, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present disclosure relates to a pre-5 th -Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4 th -Generation (4G) communication system such as Long Term Evolution (LTE). A signal transmission method based on a filter bank, includes obtaining by a transmitter pre-equalization information, wherein the pre-equalization configuration information indicates whether pre-equalization is enabled, if the pre-equalization configuration information indicates that the pre-equalization is enabled, generating by the transmitter pre-equalization coefficients according to a pre-equalization manner, and performing pre-equalization operation to transmission signals according to the pre-equalization coefficients, and performing modulation based on the filter bank.

First claim

What is claimed is:

1 . A signal transmission method based on a filter bank, comprising:
obtaining, by a transmitter, pre-equalization information, wherein the pre-equalization configuration information indicates whether pre-equalization is enabled; and if the pre-equalization configuration information indicates that the pre-equalization is enabled, generating, by the transmitter, pre-equalization coefficients according to a pre-equalization manner, performing pre-equalization operation to transmission signals according to the pre-equalization coefficients, and performing modulation based on the filter bank.

2 . The signal transmission method of claim 1 , wherein the pre-equalization configuration information is contained in scheduling control signaling obtained by the transmitter.

3 . The signal transmission method of claim 2 , further comprising:
obtaining, by the transmitter from the scheduling control signaling, information of subframe type adopted when the pre-equalization is enabled or disabled, wherein the information of subframe type indicates number of symbols transmitted in a subframe and transmission timing of a first symbol.

4 . The signal transmission method of claim 1 , wherein the pre-equalization manner is pre-defined, or an indication of the pre-equalization manner is contained in the pre-equalization configuration information.

5 . The signal transmission method of claim 4 , wherein the pre-equalization manner comprises:
performing pre-equalization to both amplitude and phase, or performing pre-equalization to the phase.

6 . The signal transmission method of claim 5 , wherein if the pre-equalization manner comprises performing pre-equalization to both amplitude and phase, generating the pre-equalization coefficients according to the pre-equalization manner comprises:
generating the pre-equalization coefficients according to channel status information and the pre-equalization manner, wherein a composite equivalent channel frequency response of the pre-equalization coefficients and a channel frequency response is a real number or has an imaginary part approaches to 0, and modulus of the equivalent channel frequency response approximates to 1.

7 . The signal transmission method of claim 5 , wherein if the pre-equalization manner comprises performing pre-equalization to the phase, generating the pre-equalization coefficients according to the pre-equalization manner comprises:
generating the pre-equalization coefficients according to channel status information and the pre-equalization manner, wherein a composite equivalent channel frequency response of the pre-equalization coefficients and a channel frequency response is a real number or has an imaginary part approaches to 0, and modulus of the equivalent channel frequency response approximates to modulus of the channel frequency response.

8 . The signal transmission method of claim 6 , wherein the channel status information is obtained from channel reciprocity.

9 . The signal transmission method of claim 5 , wherein if the pre-equalization manner comprises performing pre-equalization to the phase, the generating the pre-equalization coefficients according to the pre-equalization manner comprises:
obtaining a phase indicator according to a feedback from a receiver; and generating the pre-equalization coefficients according to the obtained phase indicator.

10 . The signal transmission method of claim 9 , wherein the transmitter obtains a quantified phase information of channel frequency response according to the phase indicator, generates frequency phase response coefficients on an allocated bandwidth according to the phase information, and takes the frequency phase response coefficients as frequency-domain pre-equalization coefficients.

11 . The signal transmission method of claim 10 , further comprising:
dividing the frequency domain into one or more sub-bands, wherein the phase indicator is based on a sub-band, the number of the one or more sub-bands is larger than or equal to 1, wherein the transmitter generates the frequency-domain pre-equalization coefficients on the allocated bandwidth according to a corresponding relationship between the phase indication and the one or more sub-bands.

12 . The signal transmission method of claim 9 , wherein the transmitter obtains a quantified phase information of channel impulse response according to the phase indicator, converts the phase information into corresponding frequency phase response coefficients, and takes the frequency phase response coefficients as frequency-domain pre-equalization coefficients.

13 . The signal transmission method of claim 12 , wherein the quantified phase information of channel impulse response is phase information of a highest energy path in a multipath channel, or is phase information of an average of phases of X highest energy paths in the multipath channel, wherein X is larger than 1.

14 . The signal transmission method of claim 9 , wherein the feedback is obtained from phase indication bit field added in an uplink scheduling grant or from a dedicated feedback channel.

15 . A signal receiving method based on a filter bank, comprising:
determining, by a receiver, whether post-equalization is to be performed to demodulated signals based on the filter bank according to pre-equalization configuration information, wherein the pre-equalization configuration information indicates whether pre-equalization is enabled or disabled; if the pre-equalization configuration information indicates that the pre-equalization is enabled, performing, by the receiver, a post-equalization to the demodulated signals based on the filter bank according to a composite equivalent channel frequency response of pre-equalization coefficients and a channel frequency response; and if the pre-equalization configuration information indicates that the pre-equalization is disabled, performing, by the receiver, amplitude and phase post-equalization to the demodulated signals based on the filter bank according to an estimated channel frequency response.

16 . The method of claim 15 , wherein performing the post-equalization according to the composited equivalent channel frequency response of the pre-equalization coefficients and the channel frequency response comprises:
directly estimating the composite equivalent channel frequency response of the pre-equalization coefficients and the channel frequency response through receiving a reference signal which is pre-equalized and used for channel estimation; or performing a channel estimation to a reference signal which is not pre-equalized and indirectly estimating the composite equivalent channel frequency response of the pre-equalization coefficients and the channel frequency response according to a pre-equalization manner adopted by a transmitter, wherein the composite equivalent channel frequency response is used for performing post-equalization to the demodulated signals based on the filter bank.

17 . The method of claim 15 , wherein the pre-equalization manner is pre-defined, or an indication of the pre-equalization manner is contained in the pre-equalization configuration information.

18 . A transmitter based on a filter bank, comprising:
a control signaling processing module, a pre-equalization switch, an information source, a pre-equalization coefficients generating module and a transmission synthesis filter bank, wherein the control signaling processing module is configured to obtain pre-equalization configuration information, wherein the pre-equaliza

Assignees

• Samsung Electronics Co Ltd

Inventors

• Yu Bin
• Zhu Dalin
• Sun Pengfei

Classifications

• H04B1/1036

  with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters (H04B1/123 takes precedence; filter circuits H03H) · CPC title

• H04L25/03343

  Arrangements at the transmitter end · CPC title

• H04B1/7101

  with estimation filters · CPC title

• H04L25/03254

  Operation with other circuitry for removing intersymbol interference · CPC title

• H04B1/40 Primary

  Circuits · CPC title