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Multicode MIMO Systems With Quaternary LCZ and ZCZ Sequences
Jae-Dong Yang,Xianglan Jin,Kyoung-Young Song,Jong-Seon No,Dong-Joon Shin IEEE 2008 IEEE Transactions on Vehicular Technology VT Vol.57 No.4
<P>In this paper, we propose multicode multiple-input-multiple-output (MIMO) systems with quaternary low-correlation zone (LCZ) and zero-correlation zone (ZCZ) sequences as spreading codes. Quaternary LCZ and ZCZ sequences have very low correlation values when the time shifts between these sequences are within the predetermined correlation zone, and thus, the multiuser or multipath interference can be substantially reduced when the delay is within a few chips. The bit error probability of the proposed systems is theoretically analyzed, which is numerically confirmed. It is also numerically shown that the performance of the multicode MIMO systems with quaternary LCZ and ZCZ sequences is better than that of the conventional multicode MIMO systems with quaternary spreading codes constructed from pairs of binary Hadamard codes.</P>
Jang, Ji-Woong,Kim, Sang-Hyo,No, Jong-Seon The Korea Institute of Information and Commucation 2010 Journal of communications and networks Vol.12 No.4
In this paper, using binary (N, M, L, $\epsilon$) low correlation zone (LCZ) sequence sets, we construct new quaternary LCZ sequence sets with parameters (2N, 2M, L, $2{\epsilon}$). Binary LCZ sequences for the construction should have period $N\;{\equiv}\;3$ mod 4, L|N, and the balance property. The proposed method corresponds to a quaternary extension of the extended construction of binary LCZ sequence sets proposed by Kim, Jang, No, and Chung [1].
장지웅,김상효,노종선 한국통신학회 2010 Journal of communications and networks Vol.12 No.4
In this paper, using binary (N,M,L, ) low correlation zone (LCZ) sequence sets, we construct new quaternary LCZ sequence sets with parameters (2N, 2M,L, 2). Binary LCZ sequences for the construction should have period N ≡ 3 mod 4,L|N, and the balance property. The proposedmethod corresponds to a quaternary extension of the extended construction of binary LCZ sequence sets proposed by Kim, Jang, No, and Chung [1].
정정수(Jung-Soo Chung),김영식(Young-Sik Kim),장지웅(Ji-Woong Jang),노종선(Jong-Seon No),정하봉(Ha-Bong Chung) 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.11C
[1]에서 LCZ 수열군의 2배 확장을 제안하였다. 본 논문에서는 [1]에서의 2배 확장방법을 일반화하는 새로운 확장방법을 제안한다. 이 생성방법을 사용하면 인수가 (N,M,L,ε)인 q진 LCZ 수열군은 인수가(pN,pM,p「(L+1)/p」-,pε)인 q진 LCZ 수열군이 된다. 이 때, p는 소수이고 p는 q의 약수다. 특히 L≡p-1modp 일 때, 확장된 q진 LCZ 수열군의 인수는 (pN,pM,L,pε)이 된다. In this paper, a new extending method of q-ary low correlation zone(LCZ) sequence sets is proposed, which is a generalization of binary LCZ sequence set by Kim, Jang, No, and Chung. Using this method, q-ary LCZ sequence set with parameters (N,M,L,ε) is extended as a q-ary LCZ sequence set with parameters (pN,pM,p「(L+1)/p」-1,pε), where p is prime and p|q.
New Extension Method of Quaternary Low Correlation Zone Sequence Sets
JANG, Ji-Woong,KIM, Young-Sik,KIM, Sang-Hyo The Institute of Electronics, Information and Comm 2010 IEICE transactions on fundamentals of electronics, Vol.93 No.2
<P>We propose an extension method of quaternary low correlation zone (LCZ) sequence set with odd period. From a quaternary LCZ sequence set with parameters (<I>N</I> , <I>M</I>, <I>L</I>, 1), the proposed method constructs a new quaternary LCZ sequence set with parameters (2<I>N</I>, 2<I>M</I>, <I>L</I>, 2), where <I>N</I> is odd. If the employed LCZ sequence set in the construction is optimal, the extended LCZ sequence set becomes also optimal where <I>N</I> = <I>kL</I>, <I>L</I> > 4, and <I>k</I> >2.</P>