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Intel : Patent Issued for Antenna Control System and Method (USPTO 9775115)

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10/05/2017 | 11:50pm CEST

By a News Reporter-Staff News Editor at Telecommunications Weekly -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Proctor, Jr., James A. (Indialantic, FL), filed on June 1, 2016, was published online on September 26, 2017.

The assignee for this patent, patent number 9775115, is INTEL CORPORATION (Santa Clara, CA).

Reporters obtained the following quote from the background information supplied by the inventors: "Precise power control in wireless communication systems such as cellular mobile telephone systems can be problematic, especially at the edge of a cell where interference is often the highest. Due to potential interference, the benefit of techniques such as high order modulation to transmit at higher data rates can be limited.

"Code Division Multiple Access (CDMA) systems such as 20 IS-95 and IS-2000 are interference limited, and their inherent capacity generally can be enhanced using beam-steering techniques. For example, based on indoor and outdoor field trials, significant improvements in signal to interference ratio (SIR) has been achieved using directional antenna arrays."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "One aspect of the present invention is directed toward a system and method to increase the bandwidth of a wireless communication system. In an illustrative embodiment, each of multiple directional transmissions from a transmitter of a subscriber unit is received at a receiver unit such as a base unit of a CDMA (Code Division Multiple Access) communication system. A quality of received signals at the receiver unit is then determined for each of the multiple directional transmissions from the transmitter. Based on the detected quality of received signals, the directional transmission from the transmitter that produces a higher quality received signal at the receiver can be identified. More optimal antenna settings of the transmitter can thus be determined by comparing link quality metrics generated for each of multiple directional transmissions. Consequently, settings of the subscriber unit transmitter can be adjusted to support more efficient directional transmissions to a base station receiver.

"A link quality message indicating which of multiple directional transmissions from the transmitter produces a higher quality received signal can then be communicated to the subscriber unit. This feedback information can be conveyed in a number of ways. For example, a link quality message can be transmitted to the subscriber units over a dedicated, shared channel such as a feedback channel partitioned into periodically repeating sequences of frames. In a more specific application, feedback messages are communicated to a subscriber unit on a forward link CDMA channel via a technique such as bit-puncturing on an assigned forward link channel.

"A link quality message can be a metric based on system parameters. For instance, the receiver unit or base unit can measure a power level of a received signal for each of multiple directional transmissions from the transmitter of a subscriber unit. Based on received power levels for each of multiple directional transmissions, a preferred antenna setting for the subscriber unit and corresponding transmitter can be determined. A link quality message can be based on other suitable system parameters such as a signal to noise ratio or bit error rate detected at the receiver unit.

"In one application, a link quality message communicated to a subscriber unit is a single bit indicating which of two previous directional transmissions from the subscriber unit produces a higher quality received signal at the base unit. Typically, a subscriber unit is synchronized with the base station for transmitting a majority of data information to the base unit based on first directional antenna settings and occasionally transmitting from the subscriber unit to the base unit based on second directional antenna settings.

"A transmit lobe of the subscriber unit and corresponding wireless transmitter can be multiplexed between two or more different angular positions in a horizontal plane. In this way, the subscriber unit can transmit along two or more paths, each having a potentially different path loss depending on environmental conditions.

"If it is determined that new antenna settings of a subscriber unit would be more optimal in lieu of previously used settings, the transmitter or antenna array of the subscriber unit can be adjusted accordingly. Consequently, a beam-steering subscriber unit that is mobile with respect to a base unit can be adjusted so that a wireless communication link is continually optimized for use. The receiver can use beam-steering techniques to receive a wireless signal.

"Link quality messages can be transmitted to corresponding subscriber units over a dedicated or shared channel. In this instance, a forward link channel from the base unit can be partitioned to transmit multiple feedback messages to each of multiple subscriber units on a forward link CDMA channel.

"Each subscriber unit is optionally assigned use of particular time slots or data fields of the feedback channel to retrieve feedback messages. Part of a time-slot can be allocated for use by a subscriber unit to receive feedback messages indicating how to adjust its antenna settings.

"Based on these techniques, a base unit can monitor received signals and generate feedback information to maintain efficient wireless links with each of multiple subscriber units.

"Another aspect of the present invention involves providing feedback information to one or multiple subscriber units so that their corresponding transmit settings such as power output levels are minimized for a particular antenna orientation and position in a shared wireless communication system. For instance, a subscriber unit can transmit Power Control Groups (PCGs) to the base unit over multiple successive time slots or frames. In this instance, the PCGs can be analyzed at the base unit for generating feedback information that is communicated to the subscriber unit.

"A feedback channel from the base unit to the subscriber unit can be used to adjust power settings of a transmitter at the subscriber unit so that its data transmissions are optimized. For example, a continuous, periodic or intermittent bit stream can be transmitted on a feedback channel to the subscriber unit indicating whether it should increase or decrease its power output level for future transmissions along a particular path.

"Generally, multiple types of antenna or transmitter settings can be adjusted based on receiving two or more types of feedback messages in a feedback channel. Consequently, two or more feedback control loops can be supported to adjust directional transmissions of the transmitter.

"A single feedback bit such as a power control bit received in the feedback channel can indicate whether power output at the subscriber unit should be increased or decreased for future transmissions. Thus, for each of multiple framed transmissions from the subscriber unit, a power level can be increased or decreased, for example, by 1 dB. The power control bit can be dithered between logic high and logic low levels for successive transmissions over the feedback channel so that the subscriber unit transmits at an optimal or near-optimal power output level.

"In one application, the power control bit is occasionally substituted with a lobe compare bit to control a directional output of the transmitter rather than power output. Accordingly, information transmitted in a data field, time slot or frame of the feedback channel can be used to control multiple aspects of a subscriber unit.

"In certain situations, the transmitter settings will be adjusted to transmit along a new direction. Since a path loss can be different for the new directional transmissions, the power control feedback messages can then be communicated to readjust a power output of the transmitter.

"A specific subscriber unit can identify a type of feedback control message based on a time slot or frame in which it is transmitted. For example, a position of a feedback message in a frame of multiple repeating sequences of frames can be used to identify a type of feedback message received over the feedback channel. No additional data such as a tag indicating the type of feedback message is necessary. However, it should be noted that in one application, a tag or message type identifier is used to indicate the type of feedback message rather than the position of a frame in a sequence of frames to identify a message type. Consequently, a power control loop and lobe control loop can be established between a subscriber unit and base unit to optimize transmitter settings at the subscriber unit.

"As discussed, the subscriber unit can occasionally transmit along a different direction in a specified time interval, time slot or frame. The base unit can be synchronized to receive the signal along the different direction and, instead of communicating a power control bit back to the subscriber unit in a specified feedback time slot, the base station can transmit a lobe compare bit in a feedback channel to the subscriber unit. The lobe compare bit can indicate which transmitter setting at the subscriber unit is perceived to be better for directional data transmissions.

"A bit or bit sequence in a time slot of a feedback channel can have a unique purpose depending on which time slot or data field it is transmitted. In one application, feedback is provided to control two aspects of a transmitter. First, messages in the feedback channel can be used to provide feedback information to control transmitter power output settings for directional transmissions from a subscriber unit to the base unit. Second, a bit or sequence of bits in the feedback channel can be used to identify which of multiple directional settings of the subscriber unit is optimal for the wireless communication system. Consequently, a two-tiered control loop including multiple types of feedback messages can be used to maintain antenna settings."

For more information, see this patent: Proctor, Jr., James A.. Antenna Control System and Method. U.S. Patent Number 9775115, filed June 1, 2016, and published online on September 26, 2017. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9775115.PN.&OS=PN/9775115RS=PN/9775115

Keywords for this news article include: Electronics, Data Transmission, INTEL CORPORATION, Directional Antenna, Wireless Technology, Wireless Communication.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2017, NewsRx LLC

(c) 2017 NewsRx LLC, source Technology Newsletters

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