| Systems and methods for implementing receiver transparent q-mode -> Monitor Keywords |
|
|
  Systems and methods for implementing receiver transparent q-modeUSPTO Application #: 20060039490Title: Systems and methods for implementing receiver transparent q-mode Abstract: In a receiver transparent Q-mode, i.e., a Q-mode that is only implemented by a transmitter, the receiver is unaware of the Q-mode state of the transmitter. In this type of Q-mode configuration, the transmitter could enter and exit Q-mode as desired while the receiver, could, for example, continue to function as if operating normally, such as in “showtime.” Through this approach, it is not necessary for the receiver to detect the transmitter's entry and exit of Q-mode. (end of abstract) Agent: Miles & Stockbridge PC - Mclean, VA, US Inventors: Marcos C. Tzannes, Arnon Friedmann USPTO Applicaton #: 20060039490 - Class: 375260000 (USPTO) Related Patent Categories: Pulse Or Digital Communications, Systems Using Alternating Or Pulsating Current, Plural Channels For Transmission Of A Single Pulse Train The Patent Description & Claims data below is from USPTO Patent Application 20060039490. Brief Patent Description - Full Patent Description - Patent Application Claims
RELATED APPLICATION DATA [0001] This application is a continuation of U.S. patent application Ser. No. 10/802,867, filed Mar. 18, 2004, now pending, which claims the benefit of and priority to U.S. patent application Ser. No. 10/106,329, filed Mar. 27, 2002, now Patent No. 6,731,695, issued May 4, 2004, which claims the benefit of and priority to U.S. Provisional Application Ser. No. 60/278,936 filed Mar. 27, 2001, entitled "Receiver Transparent Q-Mode," U.S. Provisional Application Ser. No. 60/283,467 filed Apr. 12, 2001, entitled "Receiver Transparent Q-Mode With On-Line Reconfiguration," U.S. Provisional Application Ser. No. 60/287,968 filed May 1, 2001, entitled "Receiver Transparent Q-Mode With On-Line Reconfiguration And Scrambling," and U.S. Ser. No. 60/293,034 filed May 23, 2001, entitled "Receiver Transparent Q-Mode With On-Line Reconfiguration And Scrambling And Q-Mode Symbol Distortion," all of which are incorporated herein by reference in their entirety. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention general relates to multicarrier communication systems. In particular, this invention relates to systems and methods that allow a transmitter to enter and exit a Q-Mode. [0004] 2. Description of Related Art [0005] Q-mode is being examined by ADSL standards bodies in the ITU-T in the development of the G.dmt.bis and G.lite.bis ADSL standards, both of which are incorporated herein by reference in their entirety. Q-mode is a low power transmission mode intended to save power by transmitting signals with lower PAR (Peak to Average power Ratio) with respect to normal steady state, i.e., full power, signals. The Q-mode signal with low PAR will often have the same average power as the normal steady state signals but since the peak power is reduced, power consumption can be reduced in the analog transmission circuitry. This is very important especially for saving power in telephone company central offices and remote cabinets where ADSL modems are often installed. [0006] Current Q-mode proposals utilize a Q-mode "filler" symbol with low PAR properties in order to save power at the transmitter. Discussion of this type of approach can be found in various ITU Documents, such as, BA-044, BA-045, HC-029R1, CF-033 and CF-040, all of which are incorporated herein by reference in their entirety. Other ITU proposals state that the filler symbol should be defined by the transmitter and communicated to the receiver during initialization, see BI-080 and D.87, both of which are also incorporated herein by reference in their entirety. SUMMARY OF THE INVENTION [0007] However, current systems suffer from a number of drawbacks. These exemplary drawbacks include the necessity of receivers being required to implement circuitry to detect Q-mode symbols on every DMT symbol. Furthermore, the entry and exit modes associated with the Q-mode lack robustness since the receiver needs to be able to distinguish a Q-mode symbol from a real information-carrying symbol. [0008] In contrast, the exemplary systems and methods of this invention focus on a receiver transparent Q-mode, i.e., a Q-mode that is only implemented by the transmitter, wherein the receiver is unaware of the Q-mode state of the transmitter. In this type of Q-mode configuration, the transmitter could enter and exit Q-mode as desired while the receiver, could, for example, continue to function as if operating normally, such as in "showtime." Through this approach, it is not necessary for the receiver to detect the entry and exit of Q-mode by the transmitter. [0009] Accordingly, exemplary aspects of the present invention relate to multicarrier communications systems. In particular, an exemplary aspect of the invention relates to conserving power at a transmitter. [0010] Additionally, aspect of the present invention relate to allowing a transmitter to enter into a Q-mode while the receiver is unaware of the operational state of the transmitter. [0011] Aspects of the present invention also relate to eliminating the need for a receiver to have Q-mode entry and exit detection capabilities. [0012] Aspects of the present invention also relate to seamless changing into and out of a Q-mode between a transmitter and a receiver. [0013] Additional aspects of the present invention relate to sending a plurality of symbols from a transmitter to a receiver wherein the receiver does not need to determine which of the symbols is a Q-mode symbol. [0014] These and other features and advantages of this invention are described in, or are apparent from, the following detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS [0015] The embodiments of the invention will be described in detailed, with reference to the following figures, wherein: [0016] FIG. 1 is a block diagram illustrating an exemplary portion of a transmitter according to this invention; [0017] FIG. 2 illustrates an exemplary constellation point according to this invention; [0018] FIG. 3 illustrates an exemplary 64-QAM constellation according to this invention; [0019] FIG. 4 is a block diagram illustrating an exemplary XOR scrambler according to this invention; [0020] FIG. 5 is a block diagram illustrating an exemplary transmitter having an XOR scrambler and phase rotator for a 64-QAM constellation; Continue reading... Full patent description for Systems and methods for implementing receiver transparent q-mode Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Systems and methods for implementing receiver transparent q-mode patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Systems and methods for implementing receiver transparent q-mode or other areas of interest. ### Previous Patent Application: Pattern position measuring device, method, and program, and record medium on which the program is recorded Next Patent Application: Hybrid memory architecture for reduced state sequence estimation (rsse) techniques Industry Class: Pulse or digital communications ### FreshPatents.com Support Thank you for viewing the Systems and methods for implementing receiver transparent q-mode patent info. IP-related news and info Results in 0.93744 seconds Other interesting Feshpatents.com categories: Medical: Surgery , Surgery(2) , Surgery(3) , Drug , Drug(2) , Prosthesis , Dentistry |
||
