在本文中，我們採用光碼分多址（OCDMA）的頻譜幅度編碼（SAC）來存取身體局域網路（BAN）上的多個生物信號傳輸。 BAN的SAC-OCDMA方案使用來自人體的傳感器節點獲取的不同生理信號之間的正交碼序列來進行疊加編碼傳輸。每當一定數量的發射的生理生物信號在相同的頻譜帶下被導致在彼此附近操作時，在BAN中可能出現多址干擾（MAI）。因此，發展更強韌的機制用新的檢測器的以增強容量，複雜性降低和解碼性能是我們的目的。
在本文中，我們提出了一種用於身體區域網絡的多階段OCDMA頻譜解碼的相關解碼和平衡光檢測器（BPD）減法的遞歸干擾消除（RIC）方案。所提出的方案提供逐級操作以抑制總接收機雜訊失真的變量。我們利用陣列波導光柵（AWG）循環屬性，通過遞歸配置簡化接收器設計。在數值分析中，RIC不僅逐步抑制接收機總雜訊失真，而且消除MAI。分析結果表明，所提出的RIC方案可以顯著提高系統BER。

In this thesis, we adopt spectral-amplitude coding (SAC) of optical code-division multiple-access (OCDMA) to access multiple bio-signals transmission over Body-Area Network (BAN). The SAC-OCDMA scheme of BANs calls at superposition coding transmission using orthogonal code sequences between different physiological signals acquired by sensor nodes from the human body. Multiple-access interference (MAI) may arise in BANs whenever a certain number of transmitted physiological bio-signals led to operate near each other under the same spectrum band. Therefore, designing a robust mechanism of detector to enhance capacity, complexity reduction, and decoding performance is our purpose.
In this thesis, we propose a recursive interference cancellations (RIC) scheme on correlation decoding and balanced photo-detector (BPD) subtractions over multi stages OCDMA spectral decoding for body area network. The proposed scheme provides gradual stage operation to suppress variable of related noise. We make use of arrayed waveguide grating (AWG) cyclic property to simplify the receiver design by recursive configuration. The RIC process gradually remove the corresponding signature signals on the respective correlation-subtraction round. Simultaneously, the RIC processes suppress the accumulated interference noise in the gradual correlation round. In numerical analysis, the RIC not only progressively suppress the transceiver related noise, but also eliminate MAI. Analytical results show that the proposed RIC scheme can offer significant improvement on overall system BER.

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