Rate matching calculation method and rate matching apparatus
View Patent ↗In the equation for obtaining the number of increase or decrease bits Zij on each channel for each frame defined in the specification TS25.212 Ver.3.1.0 of 3GPP that is a standard organization of the 3rd generation digital mobile communication, Ndataj is multiplied by a calculation result of RMm*Nmj/RMm*Nmj. According to a rate matching calculation method of the present invention, the correction value 1/N 2 dataj is added in order to prevent the added whole value of the equation from exceeding 1 when Ndataj is multiplied.
1. A CDMA transmission data generating method, comprising the steps of:
(a) obtaining a rate-matching parameter Z ij on each channel for each transmission frame by multiplying b with c, and then dividing the result of said multiplying by a, in which a, b, and c are defined by the following equation:
Z
ij
=
⌊
∑
m
=
1
i
RM
m
∥
b
·
N
mj
∑
m
=
1
I
RM
m
∥
a
·
N
mj
·
N
dataj
∥
c
⌋
for
alli
=
1
…
I
(
1
)
where:
RMi represents the rate matching attribute of TrCH#i,
Ni,j represent the number of bits per frame on TrCH#I, and
Ndata,j represents the number of bits on CCTrCH; and
(b) rate-matching said each channel based on said rate matching parameter Z 1j .
2. A CDMA transmission data generating method according to claim 1 , further comprising the steps of:
multiplexing said each rate-matched channel to generate frame data matching frame length; and
interleaving said frame data to generate said transmission frame.
3. A CDMA transmission data generating apparatus, comprising:
(a) a calculation section that obtains a rate-matching parameter Z ij on each channel for each transmission frame by multiplying b with c, and then divides the result of said multiplying by a, in which a, b, and c are defined by the following equation:
Z
ij
=
⌊
∑
m
=
1
i
RM
m
∥
b
·
N
mj
∑
m
=
1
I
RM
m
∥
a
·
N
mj
·
N
dataj
∥
c
⌋
for
alli
=
1
…
I
(
1
)
where:
RMi represents the rats matching attribute of TrCH#i,
Ni,j represent the number of bits per frame on TrCH#I, and
Ndata,: represents the number of bits on CCTrCH; and
(b) a rate-matching section that rate matches said each channel based on said rate matching parameter Z ij .
4. A mobile terminal including a CDMA transmission data generating apparatus according to claim 3 .
5. A base station including a CDMA transmission data generating apparatus according to claim 3 .