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    • 6. 发明申请
    • Method and apparatus for converting optical signals to radio channels
    • 用于将光信号转换成无线电信道的方法和装置
    • US20060164271A1
    • 2006-07-27
    • US10548749
    • 2004-03-08
    • Walter HirtFritz GfellerBeat Weiss
    • Walter HirtFritz GfellerBeat Weiss
    • H03M3/00
    • H04B1/7176H04B1/7174H04W4/18
    • The invention relates to a conversion of a pulse modulated signal to a radio frequency signal enableing use of applications and protocols designed for wireless optical links on radio frequency channels. The method comprises receiving the pulse modulated input signal, decoding the received pulse modulated input signal into a decoded data bit-stream, encoding the decoded data bit-stream into a recoded data bit-stream, under use of the recoded data bit-stream modulating a radio frequency signal, and transmitting the modulated radio frequency signal. In the receiver path a received radio frequency signal is converted to a pulse modulated output signal by the steps of demodulating the received radio frequency signal into a demodulated data bit-stream, decoding the demodulated data bit-stream into a received data bit-stream, encoding the received data bit-stream into a pulse modulated output signal, and forwarding the pulse modulated output signal.
    • 本发明涉及将脉冲调制信号转换成射频信号,从而能够使用针对射频信道上的无线光链路设计的应用和协议。 该方法包括接收脉冲调制输入信号,将接收到的脉冲调制输入信号解码成解码数据比特流,在解码数据比特流中使用重新编码的数据比特流调制 射频信号,并发送调制的射频信号。 在接收机路径中,接收到的射频信号通过以下步骤转换成脉冲调制输出信号:将接收的射频信号解调成解调数据比特流,将解调的数据比特流解码为接收的数据比特流, 将接收到的数据比特流编码为脉冲调制输出信号,并转发脉冲调制输出信号。
    • 7. 发明授权
    • Apparatus and method for determining a pulse position for a signal encoded by a pulse modulation
    • 用于确定由脉冲调制编码的信号的脉冲位置的装置和方法
    • US06968279B2
    • 2005-11-22
    • US09902365
    • 2001-07-10
    • Fritz GfellerWalter Hirt
    • Fritz GfellerWalter Hirt
    • H04B14/02H04B14/04H04L25/49H03K9/04
    • H04L25/4902
    • The present invention provides an apparatus and a method for determining a pulse position for a signal encoded by a pulse modulation. The signal being receivable as at least a first component (PCS) and a second component (DCS). A first storage unit (102) stores at least one symbol of the first component (PCS) and a second storage unit (104) at least one symbol of the second component (DCS). A determination unit (118) comprises a probability table (110), which in case that the first and second components (PCS, DCS) are received is addressed with the at least one symbol of the first component (PCS) and the at least one symbol of the second component (DCS). Thereby, the probability table (110) provides a value that is defined as the pulse position (DDS).
    • 本发明提供一种用于确定由脉冲调制编码的信号的脉冲位置的装置和方法。 所述信号可被接收为至少第一组件(PCS)和第二组件(DCS)。 第一存储单元(102)存储第一组件(PCS)的至少一个符号和第二组件(DCS)的至少一个符号的第二存储单元(104)。 确定单元(118)包括概率表(110),在第一和第二组件(PCS,DCS)被接收的情况下,第一组件(PCS)的至少一个符号和至少一个 第二个组件(DCS)的符号。 因此,概率表(110)提供被定义为脉冲位置(DDS)的值。
    • 8. 发明授权
    • Determining a time of arrival of a sent signal
    • US06784827B2
    • 2004-08-31
    • US10328133
    • 2002-12-20
    • Walter Hirt
    • Walter Hirt
    • G01S1374
    • G01S5/0221G01S5/02G01S5/06
    • The present invention provides an apparatus, method, and system for determining a time of arrival (TOA) and time differences of arrival (TDOA) of a transmitted signal {S} receivable at different locations of known spatial coordinates. The system comprises a first transmitter 10 with a respective antenna feed point positioned at an a priori unknown location P and emitting a first signal {S}. The system includes furthermore a set of transceivers or transponder units 20, 30 comprising first receivers 22, 32 for receiving first signals {S} by means of respective antennas with feed points located at known locations Ln. Such system also comprises second transmitters 26, 36 emitting respective derived second signals {{tilde over (S)}n} after known and scheduled respective time intervals &dgr;n as measurable between the feed points of said respective first receiving antennas located at known locations Ln and respective second transmitting antenna located at locations L′n. A set of second receivers 42, 52 receives respective second signals {{tilde over (S)}n} after known respective time intervals &tgr;n measured between the feed points of the second transmitting antennas and feed points of second receiving antennas. A controller 46 terminates the measurement cycle for each first transmitter 10 to define total signal transfer times and then sends to a processing unit 48 an ensemble of derived third signals {Ŝn}, after some known respective delay times &Dgr;Tn. Said delay times &Dgr;Tn are measured between the time one third signal {Ŝ} passes the feed point of the respective second receiving antenna and the time instant where the respective single time reference T0 issued by the controller 46 terminates the measurement cycle. The set of third signals {Ŝn} received by the processing unit 48 contains sufficient information for determining the time of arrival (TOA) and time differences of arrival (TDOA) and to compute {circumflex over (P)}, an estimate of the a priori unknown location P of a mobile radio terminal or radio tag emitting the first signal {S}.