TECHNICAL FIELD
5 [0001] The present disclosure relates to a to transmitting data in a Code Division Multiple
Access (CDMA) system. More particularly, the present disclosure relates to generating sequences
for transmitting data in the CDMA system.
BACKGROUND
10 [0002] In a CDMA system, multiple users may use the same frequency to transmit data. A Base
Station (BS) encodes the data to be transmitted my each user with a unique code, such that the
transmitted data can be recovered without any data loss. In existing methods, when the number of
users increases, the length of the code also increases. This leads to increase in complexity of design
and implementation. Some examples of the codes may include, but not limited to, Zero Correlation
15 Zone (ZCZ) sequences. The sequence and/or code length in the existing methods to generate ZCZ
sequences increases with increasing number of users. Furthermore, the existing ZCZ sequences
can only be applied to a single cell. Therefore, there is a need for a method and system to generate
ZCZ sequences with smaller length for a large number of users.
20 [0003] The information disclosed in this background of the disclosure section is only for
enhancement of understanding of the general background of the invention and should not be taken
as an acknowledgement or any form of suggestion that this information forms the prior art already
known to a person skilled in the art.
25 SUMMARY
[0004] The foregoing summary is illustrative only and is not intended to be in any way limiting.
In addition to the illustrative aspects, embodiments, and features described above, further aspects,
embodiments, and features will become apparent by reference to the drawings and the following
detailed description.
[0005] The present disclosure discloses a method for transmitting data in a Code Division Multiple
Access (CDMA) system. The method comprising receiving, by a processor, one or more Zero
Correlation (ZC) sequence parameters in a CDMA system. The method comprising generating, by
the processor, a plurality of ZC sequence sets based on the one or more ZC sequence parameters
5 and one or more Generalized Boolean Function (GBF). The method comprising encoding, by the
processor, transmission data of a User Equipment (UE) using the plurality of ZC sequences. The
method comprising transmitting, by the processor, the transmission data to a BS.
[0006] The present disclosure discloses a system for transmitting data in a Code Division Multiple
10 Access (CDMA) system. The system comprises a processor and a memory. The memory stores
processor-executable instructions, which, on execution, cause the processor to receive one or more
Zero Correlation (ZC) sequence parameters in a CDMA system. The processor is configured to
generate a plurality of ZC sequence sets based on the one or more ZC sequence parameters and
one or more Generalized Boolean Function (GBF). The processor is configured to encode
15 transmission data of a User Equipment (UE) using the plurality ZC sequences. The processor is
configured to transmit the transmission data to a BS.

We Claim:
1. A method for transmitting data in a Code Division Multiple Access (CDMA) system,
comprising:
receiving, by a processor, one or more Zero Correlation (ZC) sequence parameters in a
5 CDMA system;
generating, by the processor, a plurality of ZC sequence sets based on the one or more
ZC sequence parameters and one or more Generalized Boolean Function (GBF);
encoding, by the processor, transmission data of a User Equipment (UE) using the
plurality of ZC sequences; and
10 transmitting, by the processor, the transmission data to a base station.
2. The method as claimed in claim 1, wherein the one or more ZC sequence parameters
include: a size of a sequence set, a sequence length, size of one or more zero correlation
zones and a number of sequences in the sequence set.
15
3. The method as claimed in claim 2 wherein the one or more ZC sequence parameters are
defined by 2௦, 2௞ାଵ, 2௠and 2௞ା௠ାଶ, wherein 2௦ defines the size of a sequence set, 2௞ାଵ
defines the number of sequences, 2௠ defines the size of one or more zero correlation zones
and 2௞ା௠ାଶdefines the sequence length.
20
4. The method as claimed in claim 3, wherein s, k and m are related by: 0 ≤ s ≤ k ≤ m – 2.
5. The method as claimed in claim 4, wherein a GBF from the one or more GBF for k-s
variables is defined by:
25
.
6. The method as claimed in claim 4, wherein a GBF from the one or more GBF for k+2
variables is defined by:
7. The method as claimed in claim 4, wherein the plurality of ZC sequence sets are defined
by:
10
.
8. The method as claimed in claim 7, wherein tଵ is defined by: 0 ൑ tଵ ൑ 2ୱ – 1.
9. The method as claimed in claim 7, wherein tଶ is defined by: 0 ൑ tଶ ൑ 2୩ାଵ 15 – 1.
10. A system for transmitting data in a Code Division Multiple Access (CDMA) system
comprising:
a processor (202); and
20 a memory (204), wherein the memory (204) stores processor-executable
instructions, which, on execution, cause the processor (202) to:
receive one or more Zero Correlation (ZC) sequence parameters in a CDMA
system;
generate a plurality of ZC sequence sets based on the one or more of ZC
25 sequence parameters and one or more Generalized Boolean Function (GBF);
encode transmission data of a User Equipment (UE) using the plurality ZC
sequences; and
transmit the transmission data to a base station.
11. The system as claimed in claim 10, wherein the processor is configured to receive a one or
more ZC sequence parameters comprising: a size of a sequence set, a sequence length, one
or more zero correlation zones and a number of sequence in the sequence set.
5 12. The system as claimed in claim 11, wherein the processor is configured to receive a one or
more ZC sequence parameters, wherein the one or more ZC sequence parameters are
defined by 2௦, 2௞ାଵ, 2௠and 2௞ା௠ାଶ, wherein 2௦ defines the size of a sequence set, 2௞ାଵ
defines the number of sequences, 2௠ defines the size of zero correlation zone and
2௞ା௠ାଶdefines the sequence length.
10
13. The system as claimed in claim 12, wherein the processor is configured to receive the one
or more ZC sequence parameters, wherein s, k and m define the plurality of ZC sequence
related by: 0 ≤ s ≤ k ≤ m – 2.
15 14. The system as claimed in claim 13, wherein the processor is configured to generate a
plurality of ZC sequence sets based on the one or more ZC sequence parameters and one
or more GBF, wherein a GBF from the one or more GBF for k-s variables is defined by:
.
20 15. The system as claimed in claim 13, wherein the processor is configured to generate a
plurality of ZC sequence sets based on the one or more ZC sequence parameters and one
or more GBF, wherein a GBF from the one or more GBF for k+2 variables is defined by:
.
25
16. The system as claimed in claim 13, wherein the processor is configured to generate a
plurality of ZC sequence sets, wherein the plurality of ZC sequence sets are defined by:
17. The system as claimed in claim 16, wherein tଵ is defined by: 0 ൑ tଵ ൑ 2ୱ – 1.

18. The system as claimed in claim 16, wherein tଶ is defined by: 0 ൑ tଶ ൑ 2୩ାଵ – 1.