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Conference Paper
Design and Implementation of Digital LMR Walky-Talky for APCO P25 Phase II
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- Authors
- Min-Soo Kang, Young-Jun Chong, Sung-Jin Yoo, Seung-Hyeub Oh
- Issue Date
- 2007-12
- Citation
- Asia-Pacific Microwave Conference (APMC) 2007, pp.1-4
- Language
- English
- Type
- Conference Paper
- Abstract
- In this paper, digital LMR walky-talky was designed and fabricated for APCO P25 phase II. For linearization of RF transmitter, CFL ASIC was designed and implemented using 0.35um CMOS process. Using CFL chip, the IMD characteristic of Tx PA was improved more 30dBc when two-tone was injected and FCC emission mask was satisfied at 35.6dBm output when modulated signal CQPSK was injected. Reference sensitivity level was -119dBm, co-channel rejection was 6dB. Except the adjacent channel rejection, the others were generally satisfied with APCO P25 specifications.
- KSP Keywords
- APCO P25, CMOS Process, Modulated signal, RF transmitter, Two-tone, adjacent channel rejection, co-channel, design and implementation