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    • 1. 发明授权
    • Nested digital phase lock loop
    • 嵌套数字锁相环
    • US5463351A
    • 1995-10-31
    • US314830
    • 1994-09-29
    • Paul D. MarkoCraig P. WadinDavid L. Brown
    • Paul D. MarkoCraig P. WadinDavid L. Brown
    • H03L7/06H03L7/07H03L7/099H04L7/00H04L7/033H03L7/10
    • H03L7/07H03L7/0991H04L7/0004H04L7/033
    • A nested digital phase lock loop (DPLL) circuit (400) provides center bit sampling for incoming recovered data (406). Included in the nested DPLL circuit (400) are a narrow bandwidth DPLL (402) and a wide bandwidth DPLL (404) which generate first (410) and second (428) recovered clock signals respectively. Initially the first recovered clock signal (410) is used to clock in the recovered data (406) until the narrowband DPLL (402) is stabilized. Once the narrowband DPLL (402) is stabilized, the second recovered clock signal (428) generated from the wideband DPLL (404) is switched in by a multiplexer (424). If for any reason the center bit sampled data becomes corrupted, a RESET occurs in the wideband loop (404) to zero out the phase shift of the second recovered clock signal (428) to match that of the narrow loop. Thus, when a RESET occurs, the wideband loop is tracking at exactly the same clock rate as the narrowband loop.
    • 嵌套数字锁相环(DPLL)电路(400)为输入的恢复数据(406)提供中心位采样。 包含在嵌套DPLL电路(400)中的是窄带宽DPLL(402)和宽带宽DPLL(404),其分别产生第一(410)和第二(428)恢复的时钟信号。 最初,第一恢复时钟信号(410)用于在恢复的数据(406)中进行时钟,直到窄带DPLL(402)稳定为止。 一旦窄带DPLL(402)稳定,则从宽带DPLL(404)产生的第二恢复时钟信号(428)被多路复用器(424)切换。 如果由于任何原因,中心位采样数据被破坏,则在宽带环路(404)中发生复位以将第二恢复时钟信号(428)的相移清零以匹配窄环路的相移。 因此,当发生RESET时,宽带环路跟窄带环路完全相同的时钟速率进行跟踪。
    • 7. 发明授权
    • Seamless handoff for radio telephone systems
    • 无线电话系统的无缝切换
    • US5329635A
    • 1994-07-12
    • US881975
    • 1992-05-12
    • Craig P. WadinStelios J. PatsiokasPaul D. Marko
    • Craig P. WadinStelios J. PatsiokasPaul D. Marko
    • H04W36/30H04Q7/02H04J3/16
    • H04W36/30
    • A method for seamless transfer of a communication link from a first radio telephone base station to a second radio telephone base station comprises the following steps performed at the first base station: (100) receiving a communication link request from a calling portable radio unit; (102) synchronizing with the calling portable radio unit; (104) determining whether the calling radio has handoff authorization; (108) connecting received data to a second base to allow for synchronization to the calling radio; (112) measuring a first RSSI level at the first base station for the calling radio; (114) determining whether the first RSSI level for the calling radio is below a first handoff threshold; (116) determining a second RSSI level for the calling radio, as measured at the second base station, is above a second handoff threshold, if the first RSSI level for the calling portable radio unit is below the first handoff threshold, (118) determining whether the second RSSI level for the calling portable radio unit is above a second handoff threshold, and (120) alerting the second base station to pick up the communication link. The method further comprises the following step performed at a second base station: (122) commencing to transmit in the frame immediately following the last transmit frame of the first base.
    • 一种从第一无线电电话基站到第二无线电话基站的通信链路无缝传送的方法包括在第一基站执行的以下步骤:(100)从呼叫便携式无线电单元接收通信链路请求; (102)与所述呼叫便携式无线电单元同步; (104)确定呼叫无线电是否具有切换授权; (108)将接收的数据连接到第二基站以允许与呼叫无线电同步; (112)测量第一基站处的呼叫无线电的第一RSSI电平; (114)确定所述呼叫无线电的所述第一RSSI电平是否低于第一切换阈值; 如果所述主叫便携式无线电单元的所述第一RSSI电平低于所述第一越区切换阈值,则确定所述呼叫无线电设备的第二RSSI电平(118)在所述第二基站处测量的高于第二切换阈值(118)确定 呼叫便携式无线电单元的第二RSSI电平是否高于第二切换阈值,以及(120)警告第二基站接收通信链路。 该方法还包括在第二基站执行的以下步骤:(122)开始在紧接在第一基站的最后发送帧之后的帧中进行发送。
    • 8. 发明授权
    • Method for channel utilization in extended spectrum communication systems
    • 扩展频谱通信系统中的信道利用方法
    • US5218630A
    • 1993-06-08
    • US879436
    • 1992-05-06
    • Stelios J. PatsiokasCraig P. WadinPaul D. Marko
    • Stelios J. PatsiokasCraig P. WadinPaul D. Marko
    • H04M1/725H04W28/08H04W72/08
    • H04W72/085H04M1/72511
    • A base station allocates radio channels to radio telephone handsets in a second generation cordless telephone (CT2) communication systems by scanning each channel in a first band, and scanning each channel in a second band to measure an RSS level for each channel scanned. The base station scans the second band at a rate that is substantially faster than the rate at which it scans the first band. If a link request is received on a first channel within the first band, from a calling radio telephone, the base station determines whether the first channel has an RSS level above a predetermined threshold. If the RSS level of the first channel is above the threshold, and the calling radio telephone handset is capable of operating on the second band, the base station re-assigns a second channel, that is within the second band, to the calling radio telephone handset.
    • 基站在第二代无绳电话(CT2)通信系统中通过扫描第一频带中的每个信道来分配无线电信道到无线电话手机,并且扫描第二频带中的每个信道以测量每个被扫描的频道的RSS级别。 基站以比其扫描第一频带的速率快得多的速率扫描第二频带。 如果在第一频带内的第一频道上接收到来自呼叫无线电话的链路请求,则基站确定第一频道是否具有高于预定阈值的RSS级别。 如果第一信道的RSS级别高于阈值,并且呼叫无线电话手机能够在第二频带上操作,则基站将第二频道内的第二频道重新分配给主叫无线电话 手机
    • 9. 发明授权
    • Method and apparatus for continuous cross-channel interleaving
    • 用于连续跨信道交织的方法和装置
    • US06614767B1
    • 2003-09-02
    • US09688824
    • 2000-10-17
    • Paul D. MarkoCraig P. WadinJoseph M. Titlebaum
    • Paul D. MarkoCraig P. WadinJoseph M. Titlebaum
    • H04B7212
    • H04L1/0057H04L1/0041H04L1/0059H04L1/0065H04L1/0071H04L1/08
    • A method of interleaving data for transmission is provided wherein first and second interleaving patterns for arranging data symbols in a source data stream into first and second transmitted data streams are selected. Each of said data symbols has at least one bit. The first and second transmitted data streams are transmitted substantially simultaneously on separate transmission channels to at least one receiver. The first and second patterns are used to transmit the data symbols in the source data stream in a different order on the respective transmission channels to maximize recovery of the source data stream when the transmission channels are blocked. The selected interleaving patterns can involve reordering the data symbols throughout the first and second transmitted data streams using different reordering criteria The reordering. criteria can vary on a frame-by-frame basis if the source data stream is time division multiplexed. Complementary data can be sent on respective transmission channels.
    • 提供一种交织用于传输的数据的方法,其中选择用于将源数据流中的数据符号排列成第一和第二传输数据流的第一和第二交织模式。 所述数据符号中的每一个具有至少一个位。 第一和第二传输的数据流在单独的传输信道上基本上同时发送到至少一个接收机。 第一和第二模式用于在各个传输信道上以不同的顺序发送源数据流中的数据符号,以在传输信道被阻塞时使源数据流的恢复最大化。 所选择的交织模式可以包括使用不同的重新排序标准重新排序整个第一和第二个传输的数据流中的数据符号。 如果源数据流是时分复用的,则标准可以在逐帧的基础上变化。 互补数据可以在相应的传输信道上发送。