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1. 发明授权

US5781540A Device and method for communicating in a mobile satellite system 失效
标题翻译：用于在移动卫星系统中进行通信的装置和方法
公开(公告)号：US5781540A
公开(公告)日：1998-07-14
申请号：US497582
申请日：1995-06-30
申请人： James Eryx Malcolm , Daniel Fraley , Adrian Morris , David Roos , Kumar Swaminathan , Seok Ho Kim , Robert Carroll Marquart
发明人： James Eryx Malcolm , Daniel Fraley , Adrian Morris , David Roos , Kumar Swaminathan , Seok Ho Kim , Robert Carroll Marquart
IPC分类号： H04B7/185 , H04J3/06 , H04L7/04 , H04L7/10 , H04B7/212
CPC分类号： H04J3/0605 , H04B7/18532 , H04L7/046 , H04L7/10
摘要： The present invention relates to a device and a method for communicating in a mobile communication system. The method provides a carrier signal having a plurality of frames. Each frame has a plurality of time slots, and each time slot comprises a plurality of transmission bits. A group of time slots are assigned to a communication channel. A traffic burst signal having a plurality of traffic symbols is transmitted over the communication channel by transmitting a first preamble over one of the assigned time slots, and transmitting a second preamble and at least one of the traffic symbols over at least one of the other assigned time slots. The second preamble occupies fewer transmission bits than the first preamble. The apparatus for transmitting a telephony signal over an RF channel includes a modem receiving a digitized PCM telephony signal and producing a traffic burst signal, and a transmitting unit in communication with the modem for transmitting a FDMA/TDMA signal carrying a plurality of traffic burst signals. At least one of the traffic burst signals carries a limited preamble message including a header field and a unique word field and at least one digitized voice message associated with a telephone call. Another traffic burst signal carries at least one signal acquisition message including a unique word field.
摘要翻译：本发明涉及用于在移动通信系统中进行通信的装置和方法。该方法提供具有多个帧的载波信号。每个帧具有多个时隙，并且每个时隙包括多个传输比特。一组时隙被分配给通信信道。通过在所分配的时隙中的一个发送第一前同步码，通过通信信道发送具有多个业务符号的业务突发信号，并且通过至少一个其他分配的业务符号发送第二前导码和至少一个业务符号时隙。第二前导码占用比第一前同步码少的传输比特。用于通过RF信道发送电话信号的装置包括调制解调器，接收数字化的PCM电话信号并产生业务脉冲串信号，以及与调制解调器通信的发送单元，用于发送携带多个话务脉冲串信号的FDMA / TDMA信号。业务突发信号中的至少一个携带有限的前导消息，其包括报头字段和唯一字字段以及与电话呼叫相关联的至少一个数字化语音消息。另一业务脉冲串信号携带至少一个信号获取消息，其包括唯一的字字段。

2. 发明授权

US5710982A Power control for TDMA mobile satellite communication system 失效
公开(公告)号：US5710982A
公开(公告)日：1998-01-20
申请号：US496633
申请日：1995-06-29
申请人： Enrique Laborde , James Eryx Malcolm , Robert Carroll Marquart , Adrian Morris
发明人： Enrique Laborde , James Eryx Malcolm , Robert Carroll Marquart , Adrian Morris
IPC分类号： H04B7/005 , H04B7/185 , H04B1/00 , H04B7/00
CPC分类号： H04W52/228 , H04B7/18543 , H04W52/225 , H04W52/245 , H04W52/248
摘要： A method and system for adjusting the transmission power of a transmitter during a communication with a receiver in a mobile satellite communication system is disclosed herein. The method comprises establishing at least one threshold signal strength value for a transmitted burst; measuring the received signal strength of the burst received by the receiver; comparing the received signal strength with the threshold value; and setting a power control bit based on the comparison. The system comprises a plurality of mobile terminals having a first stored threshold value; a satellite adapted to communicate with each of the mobile terminals; at least one gateway in communication with the satellite, the gateway having a second stored threshold value, and including a routine for measuring the received signal strength of a burst signal transmitted from the mobile terminal, for comparing the received signal strength with the second stored threshold value, and for adjusting the transmission power of the gateway based on the comparison; and each of the mobile terminals including a routine for measuring the received signal strength of a burst signal transmitted from the gateway to the mobile terminals, for comparing the received signal strength with the first stored threshold value, and for adjusting the transmission power of the mobile terminal based on the comparison.

3. 发明授权

US5790940A Power control for TDMA mobile satellite communication system 失效
标题翻译： TDMA移动卫星通信系统的功率控制
公开(公告)号：US5790940A
公开(公告)日：1998-08-04
申请号：US896337
申请日：1997-07-18
申请人： Enrique Laborde , James Eryx Malcolm , Robert Carroll Marquart , Adrian Morris
发明人： Enrique Laborde , James Eryx Malcolm , Robert Carroll Marquart , Adrian Morris
IPC分类号： H04B7/005 , H04B7/185 , H04B1/00 , H04B7/00
CPC分类号： H04W52/228 , H04B7/18543 , H04W52/225 , H04W52/245 , H04W52/248
摘要： A method and system for adjusting the transmission power of a transmitter during a communication with a receiver in a mobile satellite communication system is disclosed herein. The method comprises establishing at least one threshold signal strength value for a transmitted burst; measuring the received signal strength of the burst received by the receiver; comparing the received signal strength with the threshold value; and setting a power control bit based on the comparison. The system comprises a plurality of mobile terminals having a first stored threshold value; a satellite adapted to communicate with each of the mobile terminals; at least one gateway in communication with the satellite, the gateway having a second stored threshold value, and including a routine for measuring the received signal strength of a burst signal transmitted from the mobile terminal, for comparing the received signal strength with the second stored threshold value, and for adjusting the transmission power of the gateway based on the comparison; and each of the mobile terminals including a routine for measuring the received signal strength of a burst signal transmitted from the gateway to the mobile terminals, for comparing the received signal strength with the first stored threshold value, and for adjusting the transmission power of the mobile terminal based on the comparison.
摘要翻译：本文公开了一种用于在与移动卫星通信系统中的接收机的通信期间调整发射机的发射功率的方法和系统。所述方法包括为所发射的突发建立至少一个阈值信号强度值; 测量由接收机接收的脉冲串的接收信号强度; 将接收到的信号强度与阈值进行比较; 并根据比较设置功率控制位。该系统包括具有第一存储的阈值的多个移动终端; 适于与每个移动终端通信的卫星; 与卫星通信的至少一个网关，网关具有第二存储的阈值，并且包括用于测量从移动终端发送的突发信号的接收信号强度的例程，用于将接收信号强度与第二存储阈值进行比较值，并且用于基于所述比较来调整所述网关的发送功率; 并且每个移动终端包括用于测量从网关发送到移动终端的突发信号的接收信号强度的例程，用于将接收到的信号强度与第一存储的阈值进行比较，并且用于调整移动台的发送功率终端基于比较。

4. 发明授权

US5790939A Method and system of frame timing synchronization in TDMA based mobile satellite communication system 失效
标题翻译：基于TDMA的移动卫星通信系统中帧定时同步的方法和系统
公开(公告)号：US5790939A
公开(公告)日：1998-08-04
申请号：US496737
申请日：1995-06-29
申请人： James Eryx Malcolm , Robert Carroll Marquart
发明人： James Eryx Malcolm , Robert Carroll Marquart
IPC分类号： H04B7/212 , H04B7/19
CPC分类号： H04B7/2125
摘要： A method and system for synchronizing transmission TDMA frames in a mobile satellite communication system are disclosed herein. The method of synchronizing a transmitted frame timing in a mobile satellite communication system comprises the steps of broadcasting a frame timing offset from a satellite to a mobile terminal having a timer, receiving the frame timing offset information transmitted by the satellite in the mobile terminal, and adjusting the timer in the mobile terminal based on the timing offset information. The system includes a plurality of mobile terminals; a satellite adapted to communicate with each of the mobile terminals, the satellite having a satellite reference frame timing; at least one gateway in communication with the satellite, the gateway having a digital processor, the digital processor including a routine for calculating a frame timing offset; with the gateway transmitting the timing offset to at least one of the mobile terminals, the at least one mobile terminal receiving the timing offset and adjusting the mobile terminal transmit frame timing to compensate for the timing offset.
摘要翻译：这里公开了一种在移动卫星通信系统中同步传输TDMA帧的方法和系统。在移动卫星通信系统中同步发送的帧定时的方法包括以下步骤：从卫星向具有定时器的移动终端广播帧定时偏移，接收卫星在移动终端中发送的帧定时偏移信息，以及基于定时偏移信息调整移动终端中的定时器。该系统包括多个移动终端; 适于与每个移动终端进行通信的卫星，所述卫星具有卫星参考帧定时; 至少一个与所述卫星通信的网关，所述网关具有数字处理器，所述数字处理器包括用于计算帧定时偏移的例程; 所述网关向所述移动终端中的至少一个发送所述定时偏移，所述至少一个移动终端接收所述定时偏移并且调整所述移动终端发送帧定时以补偿所述定时偏移。

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