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    • 81. 发明申请
    • OFDM transceiver structure with time-domain scrambling
    • 具有时域扰频的OFDM收发器结构
    • US20050180311A1
    • 2005-08-18
    • US10781041
    • 2004-02-17
    • Haifeng WangJorma Lilleberg
    • Haifeng WangJorma Lilleberg
    • H04J11/00H04L25/03H04L27/26
    • H04L27/2602H04L25/03866
    • A method and transceiver for wireless multicarrier communications. At the transmitter side, conventional OFDM symbols, after inverse fast Fourier Transform, are scrambled in time domain and then guard-interval (GI) inserted, up-converted at the carrier frequency for transmission. At the receiver side, after GI removal and frequency domain channel equalization, the received signal is transformed into time-domain by inverse fast Fourier Transform. The time-domain equalized signal is descrambled in time domain and then transformed back to the frequency domain before it is rate-matched, demodulated and decoded. This time-domain scrambling and descrambling method can be used in a wireless OFDM system such as WLAN, cellular OFDM, and MC-CDMA.
    • 一种用于无线多载波通信的方法和收发器。 在发射机侧,在快速傅里叶逆变换之后的常规OFDM符号在时域中被加扰,然后在载波频率上插入保护间隔(GI)进行上变频以进行传输。 在接收机侧,GI去除和频域信道均衡后,通过快速傅里叶逆变换将接收信号转换为时域。 时域均衡信号在时域中被解扰,然后在速率匹配,解调和解码之前被转换回到频域。 该时域加扰和解扰方法可用于诸如WLAN,蜂窝OFDM和MC-CDMA的无线OFDM系统中。
    • 82. 发明申请
    • Blind speech user interference cancellation (SUIC) for high speed downlink packet access (HSDPA)
    • 用于高速下行链路分组接入(HSDPA)的盲语用户干扰消除(SUIC)
    • US20050043943A1
    • 2005-02-24
    • US10644051
    • 2003-08-19
    • Haifeng WangJorma Lilleberg
    • Haifeng WangJorma Lilleberg
    • H04L12/56G10L19/00
    • H04W16/14
    • This invention describes a blind speech user interference cancellation receiver for a high-speed downlink packet access (HSDPA). The key component of the blind SUIC receiver is a joint estimation on hard-decision HSDPA signals and soft-decision interfering speech user (ISU) signals with a full Walsh transform correlator used instead of the conventional RAKER, where the outputs are separated into two parts: the desired HSDPA signal with known spreading codes and the ISU signal with unknown spreading codes. The invention further describes a multistage processing for reaching a targeted convergence rate or a desired bit-error-rate for a received signal involving a hard-decision on the desired HSDPA signal and a soft-decision on the ISU signal.
    • 本发明描述了一种用于高速下行链路分组接入(HSDPA)的盲语用户干扰消除接收机。 盲SUIC接收机的关键部件是用硬判决HSDPA信号和软判决干扰语音用户(ISU)信号的联合估计,其中使用完全沃尔什变换相关器代替常规RAKER,其中输出被分成两部分 :具有已知扩展码的期望HSDPA信号和具有未知扩展码的ISU信号。 本发明进一步描述了一种多级处理,用于达到针对所需HSDPA信号的硬判决的接收信号的目标收敛速率或期望的比特误码率以及对ISU信号的软判决。