Multi-antenna signal processing method and device in uplink system

Patent metadata

Field	Value
Publication number	US-9083400-B2
Application number	US-201114131321-A
Country	US
Kind code	B2
Filing date	Dec 28, 2011
Priority date	Jul 8, 2011
Publication date	Jul 14, 2015
Grant date	Jul 14, 2015

Abstract

The disclosure discloses a multi-antenna signal processing method in an uplink system. The method includes that: after scrambling, modulation, layer mapping, pre-coding, transmission pre-coding, resource mapping and Single Carrier Frequency Division Multiple Access (SC-FDMA) signal generation are performed successively on a coded bit sequence corresponding to each codeword, a resulted signal is transmitted from each transmitting antenna port. The disclosure also provides a multi-antenna signal processing device in an uplink system. With the method and the device according to the disclosure, a lower Peak-to-Average Power Ratio (PAPR) or Cubic Metric (CM) of a signal to be sent can be ensured without imposing any constraint on a pre-coding matrix, thus reducing the cost and power consumption of a terminal whiling increasing transmission performance of the system.

First claim

The invention claimed is:

1. A multi-antenna signal processing method in an uplink system, comprising:
scrambling a coded bit sequence corresponding to each codeword to obtain a scrambled bit sequence corresponding to each codeword;
modulating the scrambled bit sequence corresponding to each codeword to obtain a modulated complex symbol corresponding to each codeword;
performing layer mapping on the modulated complex symbol corresponding to each codeword to obtain a complex symbol on each layer;
performing pre-coding on the complex symbol on each layer to obtain a complex symbol corresponding to each transmitting antenna port;
performing transmission pre-coding on the complex symbol corresponding to each transmitting antenna port to obtain a complex symbol corresponding to each transmitting antenna port that has gone through transmission pre-coding;
performing resource mapping on the complex symbol corresponding to each transmitting antenna port that has gone through transmission pre-coding to obtain a complex symbol corresponding to each transmitting antenna port that has gone through resource mapping; and
performing SC-FDMA signal generation on the complex symbol corresponding to each transmitting antenna port that has gone through resource mapping and transmitting a resulted signal from each transmitting antenna port.

2. The method according to claim 1 , wherein performing the layer mapping is:
processing the modulated complex symbol corresponding to each codeword with a mapping-and-layer-interleaving matrix.

3. The method according to claim 1 , further comprising: when performing the pre-coding,
varying an adopted pre-coding matrix according to each complex symbol, or according to an SC-FDMA symbol, or according to a time slot.

4. The method according to claim 1 , further comprising: after performing the transmission pre-coding and before performing the resource mapping, performing antenna delaying on the complex symbol corresponding to each transmitting antenna port that has gone through transmission pre-coding, to obtain a complex symbol corresponding to each transmitting antenna port that has gone through antenna delaying; and
correspondingly, performing the resource mapping on the complex symbol corresponding to each transmitting antenna port that has gone through antenna delaying.

5. The method according to claim 2 , wherein the processing the modulated complex symbol corresponding to each codeword with a mapping-and-layer-interleaving matrix is:
when 1 codeword is mapped to 2 layers, then:

(

x

(
0
)

⁡

(
i
)

x

(
1
)

⁡

(
i
)

)

=

Q
1

⁡

(

d

(
0
)

⁡

(

2
⁢
i

)

d

(
0
)

⁡

(

2
⁢
i

+
1

)

)

;

Q
1

=

[

1

0

0

1

]

;

i
=
0

,
1
,
…
⁢

,

M
symb
layer

-
1

,

M
symb
layer

=

M
symb

(
0
)

/
2

;

When 2 codewords are mapped to 2 layers, then:

(

Assignees

• Liang Chunli
• Xia Shuqiang
• Yang Weiwei
• Wang Yuxin
• Hao Peng
• Zte Corp

Inventors

• Liang Chunli
• Xia Shuqiang
• Yang Weiwei
• Wang Yuxin
• Hao Peng

Classifications

• H04B7/0456 Primary

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04L1/06

  using space diversity · CPC title

• H04B7/068

  using space frequency diversity (space-frequency coding H04L1/0606) · CPC title

• H04B7/0413

  MIMO systems · CPC title

• H04B7/0619

  using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001) · CPC title