A novel type of code design for the CP-CDMA system: Comb spectrum grouped codes

Hongbing Cheng; Meng Ma; B. L. Jiao

A novel type of code design for the CP-CDMA system: Comb spectrum grouped codes

Hongbing Cheng
, Meng Ma
, B. L. Jiao

Research output: Contribution to journal › Conference article › peer-review

8 Scopus citations

Abstract

The motivation of the present paper is to develop better CDMA codes for reducing the hardware complexity of the conventional CP-CDMA. This technology combines the frequency orthogonality of OFDM to CDMA code design for grouping the codes and allows a significant reduction for the calculations in channel equalization. The proposed method is referred to as OFDG code, which divides the codes of M chips in length into N groups, which are orthogonal one another in frequency domain. Each of the groups contains K codes which are mutually orthogonal in time domain. The design principle is introduced and a solution, called CS code, is obtained by the use of two operations to the conventional orthogonal code set; (1) an operation of cyclic repetition and (2) an operation of angle rotation. In comparison with the CP-CDMA, the points taken to channel equalization of CP-CS CDMA can be reduced by a factor of 1/N. The simulation results confirm effectiveness of this approach.

Original language	English
Pages (from-to)	729-733
Number of pages	5
Journal	IEEE Vehicular Technology Conference
Volume	60
Issue number	1
State	Published - 2004
Externally published	Yes
Event	2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States Duration: 26 Sep 2004 → 29 Sep 2004

Keywords

CP-CDMA
Comb spectrum code
Equalizer
Group Code

Cite this

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title = "A novel type of code design for the CP-CDMA system: Comb spectrum grouped codes",

abstract = "The motivation of the present paper is to develop better CDMA codes for reducing the hardware complexity of the conventional CP-CDMA. This technology combines the frequency orthogonality of OFDM to CDMA code design for grouping the codes and allows a significant reduction for the calculations in channel equalization. The proposed method is referred to as OFDG code, which divides the codes of M chips in length into N groups, which are orthogonal one another in frequency domain. Each of the groups contains K codes which are mutually orthogonal in time domain. The design principle is introduced and a solution, called CS code, is obtained by the use of two operations to the conventional orthogonal code set; (1) an operation of cyclic repetition and (2) an operation of angle rotation. In comparison with the CP-CDMA, the points taken to channel equalization of CP-CS CDMA can be reduced by a factor of 1/N. The simulation results confirm effectiveness of this approach.",

keywords = "CP-CDMA, Comb spectrum code, Equalizer, Group Code",

author = "Hongbing Cheng and Meng Ma and Jiao, \{B. L.\}",

year = "2004",

language = "English",

volume = "60",

pages = "729--733",

journal = "IEEE Vehicular Technology Conference",

issn = "1550-2252",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "1",

note = "2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security ; Conference date: 26-09-2004 Through 29-09-2004",

}

TY - JOUR

T1 - A novel type of code design for the CP-CDMA system

T2 - 2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security

AU - Cheng, Hongbing

AU - Ma, Meng

AU - Jiao, B. L.

PY - 2004

Y1 - 2004

N2 - The motivation of the present paper is to develop better CDMA codes for reducing the hardware complexity of the conventional CP-CDMA. This technology combines the frequency orthogonality of OFDM to CDMA code design for grouping the codes and allows a significant reduction for the calculations in channel equalization. The proposed method is referred to as OFDG code, which divides the codes of M chips in length into N groups, which are orthogonal one another in frequency domain. Each of the groups contains K codes which are mutually orthogonal in time domain. The design principle is introduced and a solution, called CS code, is obtained by the use of two operations to the conventional orthogonal code set; (1) an operation of cyclic repetition and (2) an operation of angle rotation. In comparison with the CP-CDMA, the points taken to channel equalization of CP-CS CDMA can be reduced by a factor of 1/N. The simulation results confirm effectiveness of this approach.

AB - The motivation of the present paper is to develop better CDMA codes for reducing the hardware complexity of the conventional CP-CDMA. This technology combines the frequency orthogonality of OFDM to CDMA code design for grouping the codes and allows a significant reduction for the calculations in channel equalization. The proposed method is referred to as OFDG code, which divides the codes of M chips in length into N groups, which are orthogonal one another in frequency domain. Each of the groups contains K codes which are mutually orthogonal in time domain. The design principle is introduced and a solution, called CS code, is obtained by the use of two operations to the conventional orthogonal code set; (1) an operation of cyclic repetition and (2) an operation of angle rotation. In comparison with the CP-CDMA, the points taken to channel equalization of CP-CS CDMA can be reduced by a factor of 1/N. The simulation results confirm effectiveness of this approach.

KW - CP-CDMA

KW - Comb spectrum code

KW - Equalizer

KW - Group Code

UR - https://www.scopus.com/pages/publications/17144397228

M3 - Conference article

AN - SCOPUS:17144397228

SN - 1550-2252

VL - 60

SP - 729

EP - 733

JO - IEEE Vehicular Technology Conference

JF - IEEE Vehicular Technology Conference

IS - 1

Y2 - 26 September 2004 through 29 September 2004

ER -

A novel type of code design for the CP-CDMA system: Comb spectrum grouped codes

Abstract

Keywords

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