Physical Layer Built-In Security Analysis and Enhancement Algorithms for CDMA Systems

Tongtong Li; Qi Ling; Jian Ren
January 2007
EURASIP Journal on Wireless Communications & Networking;1/6/2007, p1
Academic Journal
Historically developed for secure communication and military use, CDMA has been identified as a major modulation and multiple-access technique for 3G systems and beyond. In addition to the wide bandwidth and low power-spectrum density which make CDMA signals robust to narrowband jamming and easy to be concealed within the noise floor, the physical layer built-in information privacy of CDMA system is provided by pseudorandom scrambling. In this paper, first, security weakness of the operational and proposed CDMA airlink interfaces is analyzed. Second, based on the advanced encryption standard (AES), we propose to enhance the physical layer built-in security of CDMA systems through secure scrambling. Performance analysis demonstrates that while providing significantly improved information privacy, CDMA systems with secure scrambling have comparable computational complexity and overall system performance with that of conventionally scrambled systems. Moreover, it is shown that by scrambling the training sequence and the message sequence separately with two independent scrambling sequences, both information privacy and system performance can be further improved. The proposed scheme can readily be applied to 3G systems and beyond.


Related Articles

  • Cell Searching in the UMTS Wideband CDMA Layer. Litvin, Louis // Wireless Design & Development;Jan2004, Vol. 12 Issue 1, p32 

    Discusses the process involved in cell search operation in the universal mobile telecommunications system (UMTS) wideband code division multiple access layer. Description of the UMTS physical layer; Structure of the primary synchronization channel; Scrambling code determination.

  • The CDMA45O option. Wieland, Ken // Telecommunications - International Edition;Apr2006, Vol. 40 Issue 4, p23 

    The article talks about the CDMA450 option and its current growth in developing markets and parts of Europe. Presently, there are a total of 30 CDMA450 networks worldwide. The biggest appeal of the CDMA450 attraction is the MHz frequency band in which it functions. More information on how the...

  • DESIGN OF OPEN SLOT ANTENNA FOR BANDWIDTH ENHANCEMENT WITH A RECTANGULAR STUB. Chen, B.; Jiao, Y.-C.; Ren, F.-C.; Zhang, L.; Zhang, F.-S. // Progress in Electromagnetics Research Letters;Aug2011, Vol. 25, p109 

    In this paper, a novel design of open slot antenna for bandwidth enhancement is proposed and investigated. The bandwidth enhancement of the proposed antenna is achieved by simply attaching a rectangular stub to the circular radiating patch. Experimental results indicate that the bandwidth of the...

  • Performance Evaluation of High-Speed Packet Enhancement on cdma2000 1xEV-DV. Kwon, Hwanjoon; Younsun Kim; Jin-Kyu Han; Donghee Kim; Hyeon Woo Lee; Young Kyun Kim // Communications Technology;Apr2005, Vol. 22 Issue 4, p67 

    During the last few years, the cdma2000® cellular system has undergone a major enhancement within the 3rd Generation Partnership Project 2. The objective of this enhancement was to improve the bandwidth efficiency of the cdma2000 system by creating a new set of high-speed packet data...

  • Power Controlled H-ARQ in cdma2000 1xEV-DV. Kwon, Soonyil; Kijun Kim; Youngwoo Yun; Sang G. Kim; Byung K. Yi // Communications Technology;Apr2005, Vol. 22 Issue 4, p77 

    The newly applied H-ARQ technique in the reverse link of a cdma2000® 1xEV-DV system is shown to be similar in nature to the fast power control technique such that the two techniques both reduce interference to other users. In order to balance the H-ARQ gain and packet delay time, four modes...

  • Scale Time Offset Robust Modulation (STORM) in a Code Division Multiaccess Environment. Jenkins Jr., David M. // World Academy of Science, Engineering & Technology;Aug2011, Issue 56, p805 

    Scale Time Offset Robust Modulation (STORM) [1]-[3] is a high bandwidth waveform design that adds time-scale to embedded reference modulations using only time-delay [4]. In an environment where each user has a specific delay and scale, identification of the user with the highest signal power and...

  • Multipass Channel Estimation and Joint Multiuser Detection and Equalization for MIMO Long-Code DS/CDMA Systems. Buzzi, Stefano // EURASIP Journal on Wireless Communications & Networking;2006, p1 

    The problem of joint channel estimation, equalization, and multiuser detection for a multiantenna DS/CDMA system operating over a frequency-selective fading channel and adopting long aperiodic spreading codes is considered in this paper. First of all, we present several channel estimation and...

  • Cognitive Radio Bandwidth Sharing Scheme Based on the Two-way Matching Game. Kim, Sungwook // Wireless Personal Communications;Feb2013, Vol. 68 Issue 3, p893 

    Bandwidth is an extremely valuable and scarce resource, and may become congested to accommodate diverse services in wireless communications. To enhance the efficiency of bandwidth usage, the concept of cognitive radio has emerged as a new design paradigm. In this paper, a new bandwidth sharing...

  • YOUR TAKE.  // Telephony;2/28/2005, Vol. 246 Issue 4, p23 

    The article presents opinion of readers on the role of intelligence in controlling broadband services. Most think intelligence will be distributed widely, from the set-top to a regional headend, to combine the need to customize services with the ability to centralize management and control...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics