| 摘要 |
Frequency hopping in an IFDMA system takes place by utilizing a time-varying IFDMA modulation code. In particular, a modulator receives a symbol stream and a user specific IFDMA modulation code (bi (t)). The output of the modulator comprises a signal (Xi(t)) existing at certain frequencies, or subcarriers. The actual subcarriers that signal Xi(t) utilizes is dependent upon the repetition of the symbol blocks and the particular IFDMA modulation code utilized. ® KIPO & WIPO 2007
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