Detection of scrambling code confusion
US-9473202-B2 · Oct 18, 2016 · US
Method for blind estimation of a scrambling code for a CDMA 2000 uplink
US8958458B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8958458-B2 |
| Application number | US-201313792726-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 11, 2013 |
| Priority date | Mar 15, 2012 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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A method for estimating a scrambling code used on the uplink of a CDMA 2000 system. The received signal is firstly sampled at twice the chip frequency of the spreading code, and then filtered with a filter adapted to the spreading code and to pulse shaping. Differential processing of the successive samples is applied on the signal thus filtered and the differential values thus obtained are decoded using iterative belief propagation decoding. The decoded values are then used to determine the content of the shift register of the scrambling code generator at a given instant.
First claim
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The invention claimed is: 1. A method of estimating a scrambling code used on an uplink of a CDMA 2000 system, a signal emitted by a terminal on said uplink being scrambled using the scrambling code, and then spectrally spread using a spreading code and shaped with a shaping filter, said scrambling code being generated by a generator comprising a shift register looped back on itself, said method comprising: sampling the signal received by a receiver at twice a chip frequency of th…
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- H04B1/70735Primary
Electricity · mapped topic
Electricity · mapped topic
- H04B15/00Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8958458B2 cover?
- A method for estimating a scrambling code used on the uplink of a CDMA 2000 system. The received signal is firstly sampled at twice the chip frequency of the spreading code, and then filtered with a filter adapted to the spreading code and to pulse shaping. Differential processing of the successive samples is applied on the signal thus filtered and the differential values thus obtained are deco…
- Who is the assignee on this patent?
- Commissariat Energie Atomique, Commissariat Energie Atomique
- What technology area does this patent fall under?
- Primary CPC classification H04B1/70735. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 17 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).