Scheduling and coordination in a wireless network
US-9225480-B2 · Dec 29, 2015 · US
Method of cancelling inter-subcarrier interference in distributed antenna system
US9154340B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9154340-B2 |
| Application number | US-201314081545-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 15, 2013 |
| Priority date | Nov 16, 2012 |
| Publication date | Oct 6, 2015 |
| Grant date | Oct 6, 2015 |
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- Title
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Abstract
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Disclosed is a method of cancelling inter-subcarrier interferences in distributed antenna system. A method of cancelling interference performed in a transmitting station may include configuring a least one Alamouti pair by mapping subcarrier to each of input symbols, performing a 2N-point inverse fast Fourier transform (IFFT) on the at least one Alamouti pair, wherein the N is a natural number, and performing a frequency up converting on signals on which the 2N-point IFFT performed. Therefore, the inter-subcarrier interferences can be canceled efficiently.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of cancelling interference, performed in a transmitting station, comprising: configuring at least one Alamouti pair by mapping a subcarrier to each input symbol; performing a 2N-point inverse fast Fourier transform (IFFT) on the at least one Alamouti pair, wherein N is a natural number; and performing a frequency up converting on signals on which the 2N-point IFFT performed, wherein the at least one Alamouti pair is inputted to inputs 1 to N of whole inputs 1 to 2N of the 2N-point IFFT, 0 is inputted to inputs N+l to 2N of the inputs 1 to 2N of the 2N-point IFF, and the 2N-point IFFT is performed, in the performing of the 2N-point IFFT, wherein the at least one Alamouti pair is configured by using two subcarriers existing in positions of mirror images in reference to a mirror point located in (N/2)th subcarrier or (N/2+1)th subcarrier among N subcarriers, in the configuring at least one Alamouti pair. 2. The method of claim 1 , wherein symbols to which subcarriers 1 to N/2 of subcarriers 1 to N mapped are inputted to inputs 1 to N/2 of inputs 1 to N of the 2N-point IFFT, and the Alamouti pair symbols to which subcarriers in positions of mirror images of the subcarriers 1 to N/2 mapped are inputted to inputs N/2+l to N of the inputs 1 to N of the 2N-point IFFT.
Assignees
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Classifications
Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators (H04L27/26524 takes precedence) · CPC title
Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators (H04L27/2634 takes precedence) · CPC title
- H04L25/03821Primary
Inter-carrier interference cancellation [ICI] · CPC title
- H04L25/03159Primary
operating in the frequency domain (H04L25/03165, H04L25/03178 take precedence) · CPC title
Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation · CPC title
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Frequently asked questions
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- What does patent US9154340B2 cover?
- Disclosed is a method of cancelling inter-subcarrier interferences in distributed antenna system. A method of cancelling interference performed in a transmitting station may include configuring a least one Alamouti pair by mapping subcarrier to each of input symbols, performing a 2N-point inverse fast Fourier transform (IFFT) on the at least one Alamouti pair, wherein the N is a natural number,…
- Who is the assignee on this patent?
- Postech Acad Ind Found, Univ Yeungnam Iacf
- What technology area does this patent fall under?
- Primary CPC classification H04L25/03821. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 06 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).