TY - JOUR
T1 - Design and testing of a mixed signal matched filter for IS-95 CDMA code acquisition
AU - Su, Chau-Chin
AU - Lin, Hung Chi
AU - Jou, Shyh-Jye
PY - 1998/1
Y1 - 1998/1
N2 - Due to its advantages in multiple access, interference rejection, multipath mitigation, and access security, the direct-sequence spread spectrum (DS-SS) become very popular in mobile communication. For code acquisition of DS-SS signals, matched filters are the key components. This paper presents the design, implementation, and testing of a mixed signal matched filter. The proposed filter uses simple current mirrors to reduce the complexity of the crucial summation circuitry. The circuit is small in size and regular in structure; hence, one can cascade several to produce a filter of longer length. A 128-tap test chip has been implemented in a 2.5 mm2 core by means of 0.8 μm SPDM digital CMOS technology. The DC and AC measurements confirm the feasibility of the design.
AB - Due to its advantages in multiple access, interference rejection, multipath mitigation, and access security, the direct-sequence spread spectrum (DS-SS) become very popular in mobile communication. For code acquisition of DS-SS signals, matched filters are the key components. This paper presents the design, implementation, and testing of a mixed signal matched filter. The proposed filter uses simple current mirrors to reduce the complexity of the crucial summation circuitry. The circuit is small in size and regular in structure; hence, one can cascade several to produce a filter of longer length. A 128-tap test chip has been implemented in a 2.5 mm2 core by means of 0.8 μm SPDM digital CMOS technology. The DC and AC measurements confirm the feasibility of the design.
UR - http://www.scopus.com/inward/record.url?scp=0031647043&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0031647043
SN - 0255-6588
VL - 22
SP - 95
EP - 102
JO - Proceedings of the National Science Council, Republic of China, Part A: Physical Science and Engineering
JF - Proceedings of the National Science Council, Republic of China, Part A: Physical Science and Engineering
IS - 1
ER -