5 research outputs found
근거리 ν΅μ λ§μ μν 2.4 GHz λμμμμ 무μ μ±λ νΉμ± λͺ¨λΈλ§
νμλ
Όλ¬Έ(μμ¬)--μμΈλνκ΅ λνμ :μ κΈ°.μ»΄ν¨ν°κ³΅νλΆ,2001.Maste
ε η· ηΆθ·― εζμ εΊη€ν ζΒ·η©Ίι μ±λ λͺ¨λΈλ§ λ° η‘η· μμ€ν μ¦ μμ§λμ΄λ§μμ ι©η¨ η‘η©Ά
Thesis(doctoral)--μμΈλνκ΅ λνμ :μ κΈ°. μ»΄ν¨ν°κ³΅νλΆ,2006.Docto
Analysis of Indoor Wirless Channel in PCS Band
건물 μΈλΆμ μμΉνλ κΈ°μ§κ΅κ³Ό 건물 λ΄μ μμΉνλ λ¨λ§κΈ° μ¬μ΄μ μ±λ νΉμ±μ λΆμνκΈ° μν΄ μ ν μΆμ κΈ°λ²μ κΈ°λ°μΌλ‘ ν λͺ¨μ μ€νμ μννμλ€. λ³Έ λͺ¨μ μ€νμμλ 건물 λ΄μ 29κ°μ λ¨λ§κΈ°λ₯Ό μ€μΉνκ³ , κ° λ¨λ§κΈ°μμμ μμ νΉμ±μ λ€μ€ κ²½λ‘λ₯Ό ν΅ν΄ μμ λ μ¬λ¬ κ°μ μ νΈμ μνΈ κ°μ ν¨ν΄μ λΆμνμ¬ κ΅¬νλ€. κ·Έ κ²°κ³Ό μμ κ°μμΌλ‘ μΈν΄ μ°½κ° μͺ½μ μμΉν λ¨λ§κΈ°μ μμ νμκ° κ±΄λ¬Ό μ μͺ½μ μμΉνλ λ¨λ§κΈ°μ μμ νμλ³΄λ€ μμ κ²½μ°λ λνλ¬λ€. λ¨λ§κΈ°λ€κ³Ό κΈ°μ§κ΅ κ°μ μ±λ νΉμ± λΆμ κ²°κ³Ό 29κ° λ¨λ§κΈ°λ€μ mean excess delayμ νκ· κ°μ 90.01[nsec], νμ€νΈμ°¨λ 23.55 μλ€. λν rms delay spread λ νκ· 47.50[nsec]λ‘ λνλ¬μΌλ©° νμ€νΈμ°¨λ 13.17μ κ°μ 보μλ€
Indoor Wireless Channel Characteristics at 800MHz
건물 μΈλΆμ μμΉνλ μ‘μ κΈ°μ 건물 λ΄λΆμ μμΉνλ μμ κΈ° μ¬μ΄μ μ±λ νΉμ±μ λΆμνκΈ° μν΄ μ ν μΆμ κΈ°λ²μ κΈ°λ°μΌλ‘ ν λͺ¨μ μ€νμ μννμλ€. λ³Έ λͺ¨μ μ€νμμλ 건물 λ΄μ 29κ°μ μμ κΈ°λ₯Ό μ€μΉνκ³ , κ° μμ κΈ°μμμ μμ νΉμ±μ λ€μ€ κ²½λ‘λ₯Ό ν΅ν΄ μμ λ μ¬λ¬ κ°μ μ νΈμ μνΈ κ°μ ν¨ν΄μ λΆμνμ¬ κ΅¬νλ€. λͺ¨μ μ€ν κ²°κ³Όμμλ μμ κΈ°μ μμΉμ μ‘μ κΈ°μ μμΉ λ° μ νμ νΈν νΉμ±μ λ°λΌ λ€λ₯Έ μμ νΉμ±μ 보μκ³ , μμ κ°μμΌλ‘ μΈν΄ μ°½κ° μͺ½μ μμΉν μμ κΈ°μ μμ νμκ° κ±΄λ¬Ό μ μͺ½μ μμΉν μμ κΈ°μ μμ νμλ³΄λ€ μκ² λνλλ κ²½μ°λ μμλ€. λ³Έ λ
Όλ¬Έμμλ μ±λ νλΌλ―Έν°λ€, μ¦ mean excess delayμ rms delay spreadλ₯Ό ν΅ν΄ μ‘μ κΈ°μ μμ κΈ°κ°μ μ±λ νΉμ± λΆμλ μννμλ€.Channel characteristics between the outdoor transmitter far away from the building and receivers inside the building are explored theoretically using ray tracing technique. In this paper, 29 receivers are located on the single floor of the building to observe the variation of channel properties depending on receiver location. For each receiver, amplitudes and phases of all the possible rays form the transmitter to the receiver are traced to obtain impluse response. Statistical results for rms delay spread and power delay profiles for representative receiver location are given