公开(公告)号：US4893316A

公开(公告)日：1990-01-09

申请号：US890804

申请日：1986-07-24

申请人： Robert V. Janc ,  Steven C. Jasper ,  Lester A. Longley ,  Katherine L. Zebrose ,  William J. Turney ,  Ross J. Lillie

发明人： Robert V. Janc ,  Steven C. Jasper ,  Lester A. Longley ,  Katherine L. Zebrose ,  William J. Turney ,  Ross J. Lillie

IPC分类号： H03B27/00 ,  H03B28/00 ,  H03C3/40 ,  H03D1/22 ,  H03D3/00 ,  H03D7/16

CPC分类号： H03D3/007 ,  H03C3/40 ,  H03D1/2245 ,  H03D7/166 ,  H03B27/00 ,  H03B28/00 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D3/006

摘要： A digital radio receiver is described. The digital receiver of the present invention contemplates a digital radio receiver which operates on a received analog signal which has been converted to a digital form after preselection at the output of the antenna. The digital receiver of the present invention comprises a preselector, a high-speed analog-to-digital (A/D) converter, a digitally implemented intermediate-frequency (IF) selectivity section having an output signal at substantially baseband frequencies, and digital signal processor (DSP) circuit performing demodulation and audio filtering. The radio architecture of the present invention is programmably adaptable to virtually every known modulation scheme and is particularly suitable for implementation on integrated circuits.

摘要翻译： 描述数字无线电接收机。 本发明的数字接收机设想一种数字无线电接收机，其对接收到的模拟信号进行操作，该接收的模拟信号在天线的输出处被预选之后被转换成数字形式。 本发明的数字接收机包括预选器，高速模数（A / D）转换器，具有基本基带频率的输出信号的数字实现的中频（IF）选择部分，以及数字信号 处理器（DSP）电路执行解调和音频滤波。 本发明的无线电架构可编程地适应于几乎每个已知的调制方案，并且特别适用于集成电路上的实现。

公开(公告)号：US06363074B1

公开(公告)日：2002-03-26

申请号：US09473862

申请日：1999-12-28

申请人： Richard Schmidt ,  Norman Schwartz ,  Vikram Shenoy ,  Robert Dalias ,  Katherine L. Zebrose

发明人： Richard Schmidt ,  Norman Schwartz ,  Vikram Shenoy ,  Robert Dalias ,  Katherine L. Zebrose

IPC分类号： H04L1228

CPC分类号： H04Q11/0478 ,  H04J2203/0087 ,  H04L2012/5619 ,  H04L2012/563 ,  H04L2012/5663

摘要： An inter-machine trunk (IMT) is provisioned between two witches through an ATM network. The IMT includes a number of virtual connections (VCs) and cell slots within each VC for carrying telephone calls. The IMT is established by multiple repetitions of an inter-switch signaling process, each resulting in the creation of one VC. The number of VCs and cell slots for the IMT is selected based on provisioning information from a network operator. The IMT may be either a pre-established IMT (“PIMT”) or an on-demand IMT (“VIMT”). A PIMT is a quasi-permanent connection set up and torn down by an operator to provide some guaranteed data-carrying capacity on the IMT. A VIMT is created automatically upon receipt of a call when no connections are available on the IMT. An IMT can use both a PIMT and a VIMT. When a call request is received at a switch, a call processor determines whether the IMT is to carry the call. If so, a VC of the IMT is selected, and a call request message identifying the called user and the selected VC and cell slot is forwarded to the remote switch. Each switch establishes a connection between the selected VC/cell slot and a respective telephony interface circuit to the calling or called party, as appropriate. The VC/cell slots are identified in both switches by Trunk Circuit Identifier Codes (TCICs) allocated when the IMT is established.

摘要翻译： 通过ATM网络在两个女巫之间提供机间中继线（IMT）。 IMT包括用于承载电话呼叫的每个VC内的多个虚拟连接（VC）和小区时隙。 IMT通过多次重复的交换机间信令过程建立，每个都产生一个VC的创建。 基于来自网络运营商的提供信息来选择IMT的VC和小区时隙的数量。 IMT可能是预先建立的IMT（“PIMT”）或按需IMT（“VIMT”）。 PIMT是由运营商建立和拆卸的准永久连接，以在IMT上提供一些保证的数据承载能力。 当IMT上没有可用的连接时，在接收到呼叫时自动创建VIMT。 IMT可以同时使用PIMT和VIMT。 当在交换机处接收到呼叫请求时，呼叫处理器确定IMT是否携带呼叫。 如果是，则选择IMT的VC，并且将标识被叫用户和所选择的VC和小区时隙的呼叫请求消息转发到远程交换机。 每个交换机根据需要在所选择的VC /小区时隙和相应的电话接口电路之间建立到呼叫或被叫方的连接。 通过在建立IMT时分配的中继线电路标识码（TCIC），两个交换机中的VC /信元时隙被标识。