Receiver for a wireless communication device
View Patent ↗A receiver for a wireless communication device comprising means for determining a sequence of code block addresses for received rate matched encoded data to allow rate de-matching and decoding to be performed on a code block by code block basis for the received rate matched encoded data.
1. A receiver for a wireless communication device comprising:
a segmentation module for deriving a sequence of code block addresses of received rate matched encoded data;
a rate de-matching module for rate de-matching the received rate matched encoded data on a code block by block basis using code block addresses derived by the segmentation module, thereby generating rate de-matched data on a block by block basis; and
a decoder for decoding the rate de-matched data, wherein the rate de-matching and decoding are each performed independently on a code block by code block basis.
2. A receiver according to claim 1 , further comprising:
a buffer for storing received rate matched encoded data; wherein
the rate de-matching module is arranged to rate de-match the rate matched encoded data on the fly from the buffer.
3. A receiver according to claim 1 , further comprising a decoder for decoding the rate de-matched data generated by the rate de-matching module on a block by block basis.
4. A receiver according to claim 1 , wherein the determination function is arranged to derive the sequence of code block addresses for the received rate matched encoded data using rate matching parameters used to rate match the received rate matched encoded data.
5. A receiver according to claim 1 , wherein the segmentation module determines an address of first data in each code block independently.
6. A receiver according to claim 5 , wherein the segmentation module determines an address of end data of each code block independently of determining the address of first data.
7. A receiver according to claim 1 , wherein the segmentation module is arranged to derive the sequence of code block addresses using:
B
-
⌊
[
Be
minus
-
e
init
e
plus
+
1
]
⌋
where B corresponds to a location that would equate to a start of a code block for a given rate de-matched block number;
einit is the a matching parameter for an initial value of e for determining a phase of bit puncturing;
eminus is a rate matching parameter that is a decrement of e;
eplus is a rate matching parameter that is an increment of e.
8. A receiver according to claim 7 , wherein the rate de-matching module is arranged to calculate einit for each received block of rate matched encoded data.
9. A receiver according to claim 8 , wherein the rate de-matching module is arranged to derive the einit value for block of received rate de-matched encoded data using:
einit=einit for a first block and
e
init
=
e
init
-
Be
minus
+
[
Be
minus
-
e
init
e
plus
+
1
]
e
plus
for second and subsequent blocks, where B corresponds to a location that would equate to a start of a code block for a given rate de-matched block number.
10. A receiver according to claim 1 , configured to support rate de-matching and decoding of 3GPP signals.
11. A method for decoding encoded data in a wireless communication system, the method comprising:
receiving rate matched encoded data;
deriving a sequence of code block addresses of a received rate matched encoded data;
rate de-matching the received rate matched encoded data on a block by block basis using the sequence of code block addresses to determine block boundaries within the received rate matched encoded data; and
decoding rate de-matched data on a block by block basis, wherein the steps of rate de-matching and decoding are each performed independently on a code block by code block basis.
12. A receiver for a wireless communication device comprising:
a determination function for determining a sequence of code block addresses for received rate matched encoded data, the determination function being performed by a segmentation module;
a combination of rate de-matching and decoding performed independently on a code block by code block basis for the received rate matched encoded data; wherein
the segmentation module is arranged to derive the sequence of code block addresses using:
B
-
⌊
[
Be
m
i
n
us
-
e
init
e
plus
+
1
]
⌋
where B corresponds to a location that would equate to a start of a code block for a given rate de-matched block number;
einit is the a matching parameter for an initial value of e for determining a phase of bit puncturing;
eminus is a rate matching parameter that is a decrement of e;
eplus is a rate matching parameter that is an increment of e.
13. A receiver according to claim 12 , wherein the rate de-matching module is arranged to calculate einit for each received block of rate matched encoded data.
14. A receiver according to claim 13 , wherein the rate de-matching module is arranged to derive the einit value for block of received rate de-matched encoded data using:
einit=einit for a first block and
e
init
=
e
init
-
Be
m
i
n
us
+
[
Be
m
i
n
us
-
e
init
e
plus
+
1
]
e
plus
for second and subsequent blocks, where B corresponds to a location that would equate to a start of a code block for a given rate de-matched block number.