InterviewSolution
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InterviewSolution
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Are Channelization Codes Mutually Orthogonal? If So, Why Is “orthogonality Factor” Required In The Link Budget? |
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Answer» Yes, channelization codes are mutually orthogonal. Nonetheless, due to multi-path with variable time delay, channels from the same cell are no longer perfectly orthogonal and may interfere with each other. A “Downlink ORTHOGONALITY Factor”, typically 50-60%, is therefore needed in the link BUDGET to account for the INTERFERENCE – and HENCE reduces pole capacity. Yes, channelization codes are mutually orthogonal. Nonetheless, due to multi-path with variable time delay, channels from the same cell are no longer perfectly orthogonal and may interfere with each other. A “Downlink Orthogonality Factor”, typically 50-60%, is therefore needed in the link budget to account for the interference – and hence reduces pole capacity. |
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