发明名称 |
CONSTANT ENVELOPE ENCODER AND DECODER WITH ERROR CORRECTION FOR WIDEBAND CDMA COMMUNICATION SYSTEM |
摘要 |
PURPOSE: A fixed amplitude encoder and decoder including an error correction function in a wideband CDMA(Code Division Multiple Access) communication method is provided to include the error correction function by maintaining transmission amplitude as fixed amplitude. CONSTITUTION: A root cosine roll-off filter(405) filters a received signal to a band signal including a fixed bandwidth. A multiplier(410) converts the filtered signal into a baseband signal for a local oscillator. An LPF(Low Pass Filter)(415) filters the converted signal into the baseband signal. Another multiplier(420) multiplies a PN(Pseudo Noise) transmitted from a transmission apparatus to an LPF signal. A four-by-four decoder(400) corrects errors of a signal received from the multiplier. A PS(Parallel to Serial) conversion unit(460) converts parallel data outputted from the four-by-four decoder to serial data. |
申请公布号 |
KR20120088357(A) |
申请公布日期 |
2012.08.08 |
申请号 |
KR20110009656 |
申请日期 |
2011.01.31 |
申请人 |
AGENCY FOR DEFENSE DEVELOPMENT |
发明人 |
KIM, SU IL;CHOI, TAE HWAN;KIM, IHN KYUM |
分类号 |
H04B1/16;H03M13/11;H04B7/216 |
主分类号 |
H04B1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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