公开(公告)号：US20010016014A1

公开(公告)日：2001-08-23

申请号：US09773417

申请日：2001-02-01

Applicant: U.S. PHILIPS CORPORATION

Inventor： Sueng-il Nam

IPC: H04B015/00 ,  H04L025/03 ,  H04K001/02 ,  H04L025/49

CPC classification number: H04L27/368

Abstract: A short range communications system in which transmitted signals are distorted by multipath effects and non-linear characteristics of circuit elements and cause constellation errors in a received signal. These errors are determined by a receiving transceiver (TRnull) which transmits a control signal to a transmitting transceiver (TR). The control signal is applied to a stage (12) to adjust the magnitude of input baseband data prior to modulation in a modulator (14) to predistort the constellation of the modulated signals in such a way that the distortion is effectively eliminated in propagation.

Abstract translation: 一种短距离通信系统，其中发射信号由多路径效应和电路元件的非线性特性失真，并导致接收信号中的星座误差。 这些错误由向发送收发器（TR）发送控制信号的接收收发器（TR'）确定。 控制信号被施加到级（12），以在调制器（14）中调制之前调整输入基带数据的幅度，以预调制调制信号的星座，使得在传播中有效地消除失真。

公开(公告)号：US20010015994A1

公开(公告)日：2001-08-23

申请号：US09773411

申请日：2001-02-01

Applicant: U.S. PHILIPS CORPORATION

Inventor： Sueng-il Nam

IPC: H04B001/69

CPC classification number: H04J13/0022 ,  H04B7/0613 ,  H04B7/0848

Abstract: A communication system comprises a wireless local area network (LAN) formed by a plurality of spacially separated transceivers (TR, TRnull). Each of the transceivers has a transmitting section (10) for transmitting data by a combination of dual code spread spectrum techniques with transmit diversity. More particularly an input data stream is split into quadrature related channels (I,Q). Each of the channels comprises a frequency up-converter (42, 44, 46), a spread spectrum stage (50, 52) for spreading the up-converted channel signal by a respective one of two parallel produced PN codes (PN1, PN2) and an antenna (18, 20) for propagating its respective spread spectrum signal, the antennas (18, 20) being located where convenient in the coverage area of the respective transmitting section.

Abstract translation: 通信系统包括由多个空间分离的收发器（TR，TR'）形成的无线局域网（LAN）。 每个收发机具有用于通过双码扩频技术与发射分集的组合来发送数据的发送部分（10）。 更具体地，输入数据流被分成正交相关信道（I，Q）。 每个信道包括上变频器（42,44,46），扩展频谱级（50,52），用于通过两个并行产生的PN码（PN1，PN2）中的相应一个扩频上变频信道信号， 以及用于传播其各自的扩展频谱信号的天线（18,20），所述天线（18,20）位于相应发射部分的覆盖区域内方便的位置。