公开(公告)号：WO03028276A2

公开(公告)日：2003-04-03

申请号：PCT/US0231044

申请日：2002-09-30

Applicant: WORLDSPACE CORP ,  CAMPANELLA S JOSEPH

Inventor： CAMPANELLA S JOSEPH

IPC: H04L27/233 ,  H04L

CPC classification number: H04L27/2332

Abstract: A system and method for determining and correcting the phase shift between the carrier signal in a QPSK modulated data signal (402) and the local oscillator signal (403) in a receiver (404, 420, 480) of the QPSK modulated data signal by correcting the receiver's symbol information phase reference to 0 DEG relative to the received carrier phase according to an output of a correcting means (480). Use is made of the unique seed property of pseudo random sequence generators (PRSG) (486, 502) in which inputting a "seed" of length equal to the polynomial order of the PRSG, to a first PRSG, which was taken from the output of a second identical PRSG, causes the first PRSG to output a sequence of bits which will be the same as those in the second PRSG following the seed values. By comparing the received data signals, actually the PRSG sequence output bit stream, with a sequence of bits generated by a first PRSG in the receiver, which are supposed to be identical because of the unique seed property, a determination of the phase shift ambiguity between the LO and carrier signals can be made, and subsequently corrected. The principles of the invention also work for signals that modulated using octal phase shift keying.

Abstract translation: 一种用于通过校正和校正QPSK调制数据信号（402）中的载波信号与QPSK调制数据信号的接收机（404,420,480）中的本地振荡器信号（403）之间的相移的系统和方法 根据校正装置（480）的输出，接收机的符号信息相对于接收的载波相位相位为0°。 使用了伪随机序列发生器（PRSG）（486,502）的独特种子属性，其中将长度等于PRSG的多项式阶的“种子”输入到从输出中获取的第一PRSG 第二个相同的PRSG的第一PRSG，使得第一PRSG输出一个比特序列，该比特序列将与种子值之后的第二PRSG中的比特序列相同。 通过比较接收到的数据信号，实际上PRSG序列输出比特流与由接收机中的第一PRSG生成的由于独特种子属性而应该是相同的比特序列，确定相移之间的相位模糊度 可以进行LO和载波信号，并随后进行校正。 本发明的原理也适用于使用八进制相移键控进行调制的信号。

公开(公告)号：WO03028276A9

公开(公告)日：2004-09-16

申请号：PCT/US0231044

申请日：2002-09-30

Applicant: WORLDSPACE CORP ,  CAMPANELLA S JOSEPH

Inventor： CAMPANELLA S JOSEPH

IPC: H04L27/233 ,  H04B1/707 ,  H04L27/10 ,  H04L27/18

CPC classification number: H04L27/2332

Abstract: A system and method for determining and correcting the phase shift between the carrier signal in a QPSK modulated data signal (402) and the local oscillator signal (403) in a receiver (404, 420, 480) of the QPSK modulated data signal by correcting the receiver's symbol information phase reference to 0 DEG relative to the received carrier phase according to an output of a correcting means (480). Use is made of the unique seed property of pseudo random sequence generators (PRSG) (486, 502) in which inputting a "seed" of length equal to the polynomial order of the PRSG, to a first PRSG, which was taken from the output of a second identical PRSG, causes the first PRSG to output a sequence of bits which will be the same as those in the second PRSG following the seed values. By comparing the received data signals, actually the PRSG sequence output bit stream, with a sequence of bits generated by a first PRSG in the receiver, which are supposed to be identical because of the unique seed property, a determination of the phase shift ambiguity between the LO and carrier signals can be made, and subsequently corrected. The principles of the invention also work for signals that modulated using octal phase shift keying.

Abstract translation: 一种用于通过校正QPSK调制数据信号的接收机（404,420,480）中的QPSK调制数据信号（402）中的载波信号与本地振荡器信号（403）之间的相移来确定和校正QPSK调制数据信号的系统和方法， 根据校正装置（480）的输出，接收机的符号信息相位相对于接收到的载波相位参考0°。 使用伪随机序列发生器（PRSG）（486,502）的唯一种子属性，其中输入长度等于PRSG的多项式顺序的“种子”到从输出获取的第一PRSG 使第一PRSG输出与种子值之后的第二PRSG中相同的比特序列。 通过比较所接收的数据信号，实际上PRSG序列输出比特流与由接收机中的第一PRSG生成的比特序列，由于唯一的种子属性而被认为是相同的，确定了相位偏移模糊度 可以制造LO和载波信号，并随后校正。 本发明的原理也适用于使用八相相移键控进行调制的信号。

公开(公告)号：EP1032996A4

公开(公告)日：2006-07-05

申请号：EP98957612

申请日：1998-11-06

Applicant: WORLDSPACE CORP

Inventor： CAMPANELLA S JOSEPH ,  EBERLEIN ERNST ,  COURSEILLE OLIVIER ,  MELTZER STEFAN ,  DUNAS ETIENNE

IPC: H04N7/16 ,  H04B7/185 ,  H04H20/74 ,  H04H40/90 ,  H04J3/00 ,  H04N7/20 ,  H04H1/00

CPC classification number: H04H40/90 ,  H04B7/18526 ,  H04H20/74 ,  H04H2201/19

Abstract: A satellite direct radio broadcast system (10) is provided which assembles bits of broadcast programs into prime rate increments, several of which are assembled into a frame. Frames are divided into symbols which are demultiplexed into alternating one of a plurality of prime rate channels. The prime rate channels are demultiplexed onto a corresponding number of broadcast frequencies for transmission to a satellite (25). The satellite payload switches the symbols into time division multiplexed (TDM) data streams. The receivers (29) process the TDM streams using service control headers (SCHs) provided therein by broadcast stations. The SCHs facilitate transmission of different service components within broadcast channel frames, association of a primary broadcast channel with one or more secondary broadcast channels on a frame-to-frame basis, and the transmission of multiframe bit streams, or auxiliary data throughout a broadcast channel that are independent of a service, in contiguous or non-contiguous frames.

公开(公告)号：EP1072111A4

公开(公告)日：2006-09-27

申请号：EP98933306

申请日：1998-07-10

Applicant: WORLDSPACE CORP

Inventor： CAMPANELLA S JOSEPH

IPC: H04B7/155 ,  H04B7/185 ,  H04H20/71 ,  H04H1/00

CPC classification number: H04B7/18523 ,  H04H20/06 ,  H04H20/71 ,  H04H2201/19

Abstract: A digital broadcast system is provided which uses a satellite direct radio broadcast system having different downlink modulation options in combination with a terrestrial repeater network employing different re-broadcasting modulation options to achieve high availability reception by mobile radios (14), static radios and portable radios (14) in urban areas, suburban metropolitan areas, and rural areas, including geographically open areas and geographic areas characterized by high terrain elevations. Two-arm and three-arm receivers are provided which each comprise a combined architecture for receiving both satellite and terrestrial signals, and for maximum likelihood combining of received signals for diversity purposes. A terrestrial repeater is provided for reformatting a TDM satellite signal as a multicarrier modulated terrestrial signal. Configurations for indoor and outdoor terrestrial repeaters are also provided.

公开(公告)号：EP1266470A4

公开(公告)日：2005-01-12

申请号：EP01918268

申请日：2001-02-28

Applicant: WORLDSPACE CORP

Inventor： CAMPANELLA S JOSEPH

IPC: H04B7/185 ,  H04J3/06 ,  H04L27/26 ,  H04J11/00 ,  H04J14/00

CPC classification number: H04B7/18534 ,  H04J3/0602 ,  H04L27/2602

Abstract: A satellite sysem employing time diversity and a single frequency network of terrestrial re-radiation stations is provided wherein each terrestrial re-radiation station inserts a delay into a terrestrial signal. The delay allows the time of arrival of the early time diversity signal at the center of terrestrial coverage to coincide with the arrival of the corresponding late time diversity signal, thereby improving hand-off between terrestrial and satellite signals at a receiver. The delay also adjusts for distance differences between each terrestrial re-radiation station and the satellite and between each station and the center of the terrestrial coverage region. This adjustment optimizes the TDM-MCM reception by synchronizing at the center of the SFN the phase of the MCM signals re-radiated from the re-radiating stations of the SFN. The delay also compensates for the processing delay encountered when converting a satellite LOS TDM stream into a multicarrier modulated stream for transporting the satellite LOS TDM stream into a multicarrier modulated stream for transporting the satellite LOS TDM stream to user receivers and for the diversity delay between the early and late signals.

公开(公告)号：ZA200402409B

公开(公告)日：2005-03-29

申请号：ZA200402409

申请日：2004-03-26

Applicant: WORLDSPACE CORP

Inventor： CAMPANELLA S JOSEPH

IPC: H04L27/233 ,  H04B ,  H04L

公开(公告)号：AU2002327788A1

公开(公告)日：2003-04-07

申请号：AU2002327788

申请日：2002-09-30

Applicant: WORLDSPACE CORP

Inventor： CAMPANELLA S JOSEPH

IPC: H04L27/233 ,  H04B1/707 ,  H04L27/10 ,  H04L27/18

公开(公告)号：ZA200206847B

公开(公告)日：2003-08-27

申请号：ZA200206847

申请日：2002-08-27

Applicant: WORLDSPACE CORP

Inventor： CAMPANELLA S JOSEPH

IPC: H04B20060101 ,  H04J20060101 ,  H04L20060101 ,  H04J ,  H04B ,  H04L

公开(公告)号：AU9107098A

公开(公告)日：1999-03-29

申请号：AU9107098

申请日：1998-08-19

Applicant: WORLDSPACE CORP

Inventor： CAMPANELLA S JOSEPH

IPC: H04N7/20 ,  H04B7/185 ,  H04H20/74 ,  H04H60/82 ,  H04L12/28 ,  H04N7/173 ,  H04N7/10 ,  H04N7/14

Abstract: A satellite direct digital broadcast system is provided which broadcasts selected Internet information such as news reports, weather reports and stock market rates, along with radio programs. Broadcast channels comprise Internet information and a service control header to identify the type of Internet information contained therein. User terminals (22) are provided which comprise a radio broadcast receiver (2) to receive programs broadcast via satellite (20). Audio programs are played on a speaker connected to a radio broadcast receiver (21). The user terminals (22) also comprise a multimedia device such as a personal computer (29) connected to the receiver. The multimedia device is programmed to generate a computer display which prompts a user to select a topic of Internet information. The multimedia device stores received packets and selectively retrieves packets to generate displays such as Web pages using those packets which correspond to the topic of information selected by the user.