2 research outputs found
GPS L1, L2C Signal Acquisition Performance of GPS Software Receiver with respect to Pseudolite Pulsing Scheme
μμ¬μμ±μ μ°μ£Όμ곡μ GPS μμ±κ³Όλ λ¬λ¦¬ μ§μμ΄λ λΉν체μ μ€μΉλμ΄ GPS μμ±κ³Ό κ°μ΄ 거리λ₯Ό μΈ‘μ ν μ μλ ranging μ νΈλ₯Ό μ μ‘νλ μ μ‘κΈ°μ΄λ€. μμ¬μμ±μ μ νμ±, κ°μ©μ±, 무결μ±μ ν₯μμν¬ μ μμΌλ GPS μμ±μ νΈμ λν΄ μ νΈμ ν¬ν λλ κ°μμ μΌμΌν¨λ€. μμ¬μμ±μ κ·Όμ거리 λ¬Έμ λ₯Ό ν΄κ²°νκΈ° μν΄ μμ¬μμ±μ μ νΈλ₯Ό νμ±μ΄ μμ λλ§ λ΄λ³΄λ΄λ κΈ°λ²μ μ£Όλ‘ μ¬μ©νλ€. λ³Έ λ
Όλ¬Έμμλ μμ¬μμ±μ μ μ νμ±, μ΄λ νμ±, λλ€ νμ± κΈ°λ²κ³Ό μμ¬μμ±μ κ°μκ° GPS μννΈμ¨μ΄ μμ κΈ°μ L1 λ° L2C μ νΈνλμ λ―ΈμΉλ μν₯μ λΆμνμλ€. GPS L1μ νΈμ κ²½μ° μμ¬μμ±μ΄ 1κ°μΌλλ μ μ νμ±μ λν GPS μννΈμ¨μ΄ μμ κΈ°μ μ νΈ νλ λ° μΆμ μ±λ₯μ΄ κ°μ₯ μ’μκ³ 2κ° μ΄μμΌ λλ λλ€νμ±μ λν μ±λ₯μ΄ κ°μ₯ μ’μλ€. L2C μ νΈλ μΈκ°μ§ νμ±μ λν μ±λ₯μ΄ λΉμ·νκ² μμ μ μΌλ‘ λμλλ° μ μ νμ±μ λν μ±λ₯μ΄ μ½κ° μ’κ² λμλ€. L1, L2C λͺ¨λ μμ¬μμ± 3κ°κΉμ§λ λͺ¨λ νμ±μ λν΄μ μΈ‘μκ° κ°λ₯ν κ²μΌλ‘ λμλ€.N
μμ¬μμ±μ νμ±λ°©λ²μ λν GPS μννΈμ¨μ΄ μμ κΈ°μ L1, L2C μ νΈνλ μ±λ₯λΆμ
μμ¬μμ±μ μ°μ£Όμ곡μ GPS μμ±κ³Όλ λ¬λ¦¬ μ§μμ΄λ λΉν체μ μ€μΉλμ΄ GPS μμ±κ³Ό κ°μ΄ 거리λ₯Ό μΈ‘μ ν μ
μλ ranging μ νΈλ₯Ό μ μ‘νλ μ μ‘κΈ°μ΄λ€. μμ¬μμ±μ μ νμ±, κ°μ©μ±, 무결μ±μ ν₯μμν¬ μ μμΌλ GPS μμ±
μ νΈμ λν΄ μ νΈμ ν¬ν λλ κ°μμ μΌμΌν¨λ€. μμ¬μμ±μ κ·Όμ거리 λ¬Έμ λ₯Ό ν΄κ²°νκΈ° μν΄ μμ¬μμ±μ μ νΈ
λ₯Ό νμ±μ΄ μμ λλ§ λ΄λ³΄λ΄λ κΈ°λ²μ μ£Όλ‘ μ¬μ©νλ€. λ³Έ λ
Όλ¬Έμμλ μμ¬μμ±μ μ μ νμ±, μ΄λ νμ±, λλ€
νμ± κΈ°λ²κ³Ό μμ¬μμ±μ κ°μκ° GPS μννΈμ¨μ΄ μμ κΈ°μ L1 λ° L2C μ νΈνλμ λ―ΈμΉλ μν₯μ λΆμνμλ€.
GPS L1μ νΈμ κ²½μ° μμ¬μμ±μ΄ 1κ°μΌλλ μ μ νμ±μ λν GPS μννΈμ¨μ΄ μμ κΈ°μ μ νΈ νλ λ° μΆμ μ±λ₯
μ΄ κ°μ₯ μ’μκ³ 2κ° μ΄μμΌ λλ λλ€νμ±μ λν μ±λ₯μ΄ κ°μ₯ μ’μλ€. L2C μ νΈλ μΈκ°μ§ νμ±μ λν μ±
λ₯μ΄ λΉμ·νκ² μμ μ μΌλ‘ λμλλ° μ μ νμ±μ λν μ±λ₯μ΄ μ½κ° μ’κ² λμλ€. L1, L2C λͺ¨λ μμ¬μμ± 3κ°κΉ
μ§λ λͺ¨λ νμ±μ λν΄μ μΈ‘μκ° κ°λ₯ν κ²μΌλ‘ λμλ€.Pseudolites are ground-based transmitters that can be configured to emit GPS-like signals for enhancing the
GPS by providing increased accuracy, integrity, and availability. However, a pseudolite (PL) can interfere with
GPS satellite signals while it is transmitting or cause saturation to automatic gain control circuit. To solve these
problems pulsing scheme is used, which transmits PL signal during a short period of time. In this paper the effect
of the number of PL and pulsing scheme on the software GPS L1 and L2C signal acquisition performance is
studied for the three pulsing schemes such as static pulsing, sweep pulsing, and pseudo random pulsing. For GPS
L1 signal, static pulsing shows the best signal acquisition and tracking performance with one PL, and random
pulsing shows the best performance with more than or equal to two PLs. For GPS L2C signal, all three pulsing
schemes show the similar signal acquisition and tracking performance, but static pulsing shows a little better
performance. For GPS L1 and L2C signals, software GPS receivers can do positioning with up to three PLs.OAIID:oai:osos.snu.ac.kr:snu2012-01/102/0000003405/8SEQ:8PERF_CD:SNU2012-01EVAL_ITEM_CD:102USER_ID:0000003405ADJUST_YN:NEMP_ID:A000360DEPT_CD:446CITE_RATE:0FILENAME:μμ¬μμ±μ νμ±λ°©λ²μ λν GPS μννΈμ¨μ΄ μμ κΈ°μ L1, L2C μ νΈνλ μ±λ₯λΆμ.pdfDEPT_NM:κΈ°κ³ν곡곡νλΆEMAIL:[email protected]_YN:NCONFIRM: