頁籤選單縮合
題名 | 展頻接收系統設計與多向效能評估 |
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作者 | 陳明輝; | 書刊名 | 電信研究 |
卷期 | 24:2 1994.04[民83.04] |
頁次 | 頁175-189 |
分類號 | 448.815 |
關鍵詞 | 多向效能評估; 展頻接收系統; 設計; |
語文 | 中文(Chinese) |
中文摘要 | 展頻通訊技術 (Spread Spectrum Communication Technique) 具有防止干擾與彈性容量等之特點,其防干擾的程度較 FDMA(Frequence Division Multiple Access)或 TDMA (Time Division Multiple Access) 為佳,且當用戶增加時不須如 FDMA 或 TDMA 重新規劃分配頻譜或時槽。展頻通訊一般可分兩種 : 其一為 CDMA (Code Division Multiple access) 的展頻又稱為 DS 展頻 (DS-SS:Direct Sequence Spread Spectrum), 其二為 FH 展頻 (FH-SS:Frequence Hopping Spread Spectrum) 。本文主要利用 CDMA 技術做個人通訊的接 收系統設計, 依次談到有關擷取迴路 (Acquisition Loop) 、鎖定迴路 (Tracking Loop) 及柯斯塔迴路 (Costas Loop) 之電路設計,並作多向效能評估 (選擇最佳使用者數目)。 |
英文摘要 | Two major characters of Spread Spectrum Commnication Technique are interference avoidance and flexible capacity. Not only the interference avoidance is better than that-of the FDMA (Frequence Division Multiple Access) or TDMA (Time Division Multiple Access), but the extra spectrums and time slots are also need not be reprogrammed as the FDMA or TDMA did, as extra users beeing added. There are two kinds of Spread Spectrum techniques, one is CDMA (Code Division Multiple Access), which is also called DS-SS. Another is FH-SS. This article describes the receiver design of personal communication based on CDMA, which includes Acquisition loop, Tracking loop and Costas loop. The Multiple Access performance evaluation is described as well. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。