公开(公告)号：USRE43322E1

公开(公告)日：2012-04-24

申请号：US12558409

申请日：2009-09-11

申请人： Richard Douglas Schultz ,  George Rodney Nelson

发明人： Richard Douglas Schultz ,  George Rodney Nelson

IPC分类号： H04W4/00

CPC分类号： H04W52/0229 ,  H04L25/03834 ,  Y02D70/142 ,  Y02D70/144

摘要： A personal computer's (PC) microprocessor is used to provide both the physical layer (PHY) and media access control (MAC) processing functions required to implement a wireless local area network (WLAN) adapter. This technique uses the microprocessor within the personal computer to pre-compute the time critical PHY waveforms required to respond to received packets. For instance, the acknowledge (ACK) waveform required to respond to a received WLAN packet is pre-computed and stored in the PC memory. Upon receipt of a valid packet, the samples of the ACK waveform are transferred from the PC memory to a digital to analog converter (DAC). The DAC generates the transmit waveform required for the radio modulator. By pre-computing the transmit waveform samples, the required loading on the PC microprocessor is reduced during time critical periods.

摘要翻译： 个人计算机（PC）微处理器用于提供实现无线局域网（WLAN）适配器所需的物理层（PHY）和媒体访问控制（MAC）处理功能。 该技术使用个人计算机内的微处理器来预先计算响应接收到的数据包所需的时间关键PHY波形。 例如，响应所接收的WLAN分组所需的确认（ACK）波形被预先计算并存储在PC存储器中。 在接收到有效分组时，将ACK波形的样本从PC存储器传送到数模转换器（DAC）。 DAC产生无线电调制器所需的发射波形。 通过预先计算发送波形采样，PC微处理器上的所需负载在时间关键期间减少。

公开(公告)号：US06263048B1

公开(公告)日：2001-07-17

申请号：US09491438

申请日：2000-01-26

申请人： George Rodney Nelson ,  Richard D. Roberts ,  Ronald S. Squires

发明人： George Rodney Nelson ,  Richard D. Roberts ,  Ronald S. Squires

IPC分类号： H04M124

CPC分类号： H04M1/24

摘要： The performance of digital subscriber loops is tested through transmission, reception and analysis of a multi-tone power ratio (MTPR) waveform, containing plural discrete tones having equal spectral spacings and notches periodically distributed among the tones. The noise floor at a missing sub-carrier spectral location is integrated and compared to signal power of an adjacent sub-carrier within the test vector waveform. From these two values, MTPR is determined for various carrier locations, so that maximum theoretical loop payload can be calculated. To generated a figure of merit (FOM) under test, a data modem is placed at each end of the loop. The FOM obtained from MTPR analysis is channel based, not equipment based, and is independent of receiver implementation. Before placing a new customer in service, the MTPR FOMs for a number of loops are compared to bit rate information in a database, which correlates MTPR with a bit rate for a specific modem. Given the terminal equipment, MTPR FOMs, and the customer's data rate, one or more cable pairs that satisfy or exceed the FOM within an available cable bundle may be selected.

摘要翻译： 数字用户环路的性能通过传输，接收和分析多音频功率比（MTPR）波形来测试，该波形包含具有相同频谱间隔的多个离散音调和在音调之间周期性分布的缺口。 在丢失的子载波频谱位置处的噪声底层被积分并且与测试矢量波形内的相邻子载波的信号功率进行比较。 根据这两个值，确定各种载波位置的MTPR，从而可以计算最大理论环路有效载荷。 为了产生测试中的品质因数（FOM），数据调制解调器放置在循环的每一端。 从MTPR分析获得的FOM是基于信道的，而不是基于设备的，并且与接收机实现无关。 在将新客户投入使用之前，将多个循环的MTPR FOM与数据库中的比特率信息进行比较，将MTPR与特定调制解调器的比特率相关联。 给定终端设备，MTPR FOM和客户的数据速率，可以选择满足或超过可用电缆束内的FOM的一个或多个电缆对。

公开(公告)号：US06058162A

公开(公告)日：2000-05-02

申请号：US985589

申请日：1997-12-05

申请人： George Rodney Nelson ,  Richard D. Roberts ,  Ronald S. Squires

发明人： George Rodney Nelson ,  Richard D. Roberts ,  Ronald S. Squires

IPC分类号： H04M1/24

CPC分类号： H04M1/24

摘要： The performance of digital subscriber loops is tested through transmission, reception and analysis of a multi-tone power ratio (MTPR) waveform, containing plural discrete tones having equal spectral spacings and notches periodically distributed among the tones. The noise floor at a missing sub-carrier spectral location is integrated and compared to signal power of an adjacent sub-carrier within the test vector waveform. From these two values, MTPR is determined for various carrier locations, so that maximum theoretical loop payload can be calculated. To generated a figure of merit (FOM) under test, a data modem is placed at each end of the loop. The FOM obtained from MTPR analysis is channel based, not equipment based, and is independent of receiver implementation. Before placing a new customer in service, the MTPR FOMs for a number of loops are compared to bit rate information in a database, which correlates MTPR with a bit rate for a specific modem. Given the terminal equipment, MTPR FOMs, and the customer's data rate, one or more cable pairs that satisfy or exceed the FOM within an available cable bundle may be selected.

摘要翻译： 数字用户环路的性能通过传输，接收和分析多音频功率比（MTPR）波形来测试，该波形包含具有相同频谱间隔的多个离散音调和在音调之间周期性分布的缺口。 在丢失的子载波频谱位置处的噪声底层被积分并且与测试矢量波形内的相邻子载波的信号功率进行比较。 根据这两个值，确定各种载波位置的MTPR，从而可以计算最大理论环路有效载荷。 为了产生测试中的品质因数（FOM），数据调制解调器放置在循环的每一端。 从MTPR分析获得的FOM是基于信道的，而不是基于设备的，并且与接收机实现无关。 在将新客户投入使用之前，将多个循环的MTPR FOM与数据库中的比特率信息进行比较，将MTPR与特定调制解调器的比特率相关联。 给定终端设备，MTPR FOM和客户的数据速率，可以选择满足或超过可用电缆束内的FOM的一个或多个电缆对。