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5 results for "noise-matching"
Channel Characterisation and System Design for Sub-Surface Communications By David Gibson
eBook (PDF): $54.62
Based on the author's PhD thesis, this book is a theoretical study of subterranean radio communication, with the focus on methods that depend primarily on the penetration of electromagnetic fields... More > through the ground. Through-the-earth communication using e-m fields - specifically magnetic induction - plays a role in search and rescue systems used in the mining industry. It is also used for borehole telemetry, pipeline location and by cavers and pot-holers. Chapters describe propagation, antennas, and the design of transmitters and receivers. A figure of merit - the specific aperture - is introduced as an aid to antenna design. A crucial aspect of all systems is the signal to noise ratio, for which the strategy of noise-matching is introduced. The design of a wide-band low-frequency sounder is described, for channel evaluation using a non-ideal binary sequence. A method of calculating the inverse of a generalised sequence is described, for which cross-correlation results in a system identification signal.< Less
Channel Characterisation and System Design for Sub-Surface Communications By David Gibson
Paperback: List Price: $308.09 $77.02 | You Save: 75%
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Based on the author's PhD thesis, this book is a theoretical study of subterranean radio communication, with the focus on methods that depend primarily on the penetration of electromagnetic fields... More > through the ground. Through-the-earth communication using e-m fields - specifically magnetic induction - plays a role in search and rescue systems used in the mining industry. It is also used for borehole telemetry, pipeline location and by cavers and pot-holers. Chapters describe propagation, antennas, and the design of transmitters and receivers. A figure of merit - the specific aperture - is introduced as an aid to antenna design. A crucial aspect of all systems is the signal to noise ratio, for which the strategy of noise-matching is introduced. The design of a wide-band low-frequency sounder is described, for channel evaluation using a non-ideal binary sequence. A method of calculating the inverse of a generalised sequence is described, for which cross-correlation results in a system identification signal.< Less
Finding The Right Other Half by Understanding and Applying The Science of Physical Traits and Their Inherent Behaviors By AnhViet Nguyen
eBook (ePub): $3.99
Divorce has become an accepted norm in the US and many other countries as well. Even in countries where divorce was rare, it is growing at an alarming rate. Divorce is costly, both in emotionally and... More > financially. Not everyone wants a divorce. When we get married, we all have the intention of being married for life. Till death do us part, right? A lot of people are puzzled by their divorce. "We love each other," they all proclaimed. Love alone is not enough. After a few years of marriage, love and endorphins will eventually wear out. There is no more sugarcoating. What used to be cute and adorable qualities now become an annoyance. How many times have we heard this: "The noise she makes when eating used to be adorable. Now it annoys the hell out of me." We can use science to help determine compatibility between 2 people who are about to spend their lives together. To avoid the emotional and financial costs of divorce, we can apply the science of physical traits and behaviors to find a compatible partner.< Less
Evening Falls, Green Pictured Rocks By Scott Dudley
Hardcover: $52.17
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There is no hidden theme to fish out. What it means to you is what it means. If it is meaningless, okay. My process in creating is simply to quiet myself from as much background noise as I can... More > muster. This noise is external: media, interpersonal drama, day to day operations, and work. The noise is quieter, but far more distracting internally where future and past exchange steel chair cage match blows to grab the championship belt of the title of ‘Most Important Thoughts’, where ego masquerades as soul, where clutter impedes clarity. So I quiet to the degree that I am able and then like a Mockingbird, I try to whistle the sounds I hear in that quiet place, limited by a range of tonality and tempo that necessarily comes from taking material produced in collective supra-consciousness and playing it out as words, through my own clutter. What I hear far exceeds my ability to communicate.< Less
13—Tom Swift and the IntraEarth Invaders By Victor Appleton II
Paperback: $9.99
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Novel 13 in this new series has Tom Swift investigating a strange thrumming noise coming from deep below the high-security Helium City complex. A lengthy search to a match to the sounds does not bear... More > fruit and so he builds a series of probes to be lowered into both the gaseous helium as well as the previously unexplored liquid helium that lies miles under the ocean floor. He is surprised—more like shocked—to find several blobs of energy that are moving sluggishly in the highly-pressurized liquid emitting flashes of light. When he and his best friend, Bud Barclay, go down in a small sphere they are attacked, their communication line severed and they are left for dead. But, they manage to struggle out and Tom now believes he has a solid idea of the nature of these attacking energies. He makes an intergalactic call for help, and when it arrives everyone finds out more than they thought possible. They are in far greater danger than could be imagined. Can Tom put an evil Djinn back into the bottle?< Less

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