Umair Gaines
SSB is an acronym with various meanings in electrical engineering. In this context, SSB most commonly refers to Single-Sideband Transmission or Single-Sideband Modulation, a system where the carrier and one of the sidebands are removed, allowing for more efficient use of transmitter power and improved range in radio communication. SSB can also refer to Solid-State Batteries, which use solid electrolytes to conduct ions between electrodes, offering higher energy density and broader temperature and voltage ranges compared to conventional batteries.
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What You'll Learn
Single-sideband modulation
One method of producing an SSB signal is to remove one of the sidebands via filtering, leaving only either the upper sideband (USB) or the lower sideband (LSB). Most often, the carrier is reduced or removed entirely (suppressed), referred to as single sideband suppressed carrier (SSBSC). Assuming both sidebands are symmetric, no information is lost in the process. Since the final RF amplification is now concentrated in a single sideband, the effective power output is greater than in normal AM.
SSB transmissions use amplifier energy more efficiently, providing longer-range transmission for the same power output. The occupied spectrum is less than half that of a full carrier AM signal. SSB reception requires frequency stability and selectivity beyond that of inexpensive AM receivers, which is why broadcasters have seldom used it. In point-to-point communications, where expensive receivers are in common use, they can be adjusted to receive whichever sideband is being transmitted.
SSB was also used over long-distance telephone lines as part of a technique known as frequency-division multiplexing (FDM). With this technology, many simultaneous voice channels could be transmitted on a single physical circuit. With SSB, channels could be spaced only 4,000 Hz apart, while offering a speech bandwidth of nominally 300 Hz to 3,400 Hz. The Strategic Air Command established SSB as the radio standard for its aircraft in 1957. It has since become a de facto standard for long-distance voice radio transmissions.
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Single-sideband transmission
SSB transmission may be produced in the same manner as vestigial sideband by using a high-pass filter Hs(jω) which eliminates all signals on one side of the carrier frequency. The SSB signal can also be regarded as the resultant of quadrature modulation of a carrier by a pair of signals in phase quadrature.
One method of producing an SSB signal is to remove one of the sidebands via filtering, leaving either the upper sideband (USB) or the lower sideband (LSB). Most often, the carrier is reduced or removed entirely, referred to as single sideband suppressed carrier (SSBSC). Since the final RF amplification is now concentrated in a single sideband, the effective power output is greater than in normal AM.
SSB is well-suited for the transmission of voice due to the energy gap in the spectrum of voice signals between zero and a few hundred hertz. SSB was used over long-distance telephone lines, as part of a technique known as frequency-division multiplexing (FDM). With this technology, many simultaneous voice channels could be transmitted on a single physical circuit. SSB has become a de facto standard for long-distance voice radio transmissions.
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SSB's use in radio communication
SSB stands for Single Side Band and is a form of single-sideband modulation. It is a way to communicate via radio, primarily used for two-way voice communication. SSB is used by ham radio operators, aircraft and air traffic control, ships at sea, military and spy networks, and occasionally some shortwave broadcast stations.
SSB is an effective way to transmit voice signals over long distances. It is a standard for long-distance voice radio transmissions and is commonly used for aircraft communication. SSB signals can be transmitted over greater distances than FM signals and exhibit more graceful degradation over distance. It is also used for international communications and has been used for communication between the US and Britain.
SSB techniques can be adapted to frequency-shift and frequency-invert baseband waveforms (voice inversion). This method was used during World War II as a simple way to encrypt speech. However, these simple inversion-based speech encryption techniques are no longer considered secure and can be easily decrypted.
The process of producing an SSB signal involves removing one of the sidebands via filtering, leaving either the upper sideband (USB) or the lower sideband (LSB). The carrier is often reduced or removed entirely, resulting in a single sideband suppressed carrier (SSBSC). This process allows for more efficient use of amplifier energy, providing longer-range transmission with the same power output.
SSB reception requires frequency stability and selectivity beyond that of inexpensive AM receivers, which is why broadcasters have rarely used it. However, in point-to-point communications with expensive receivers, they can be adjusted to receive the transmitted sideband successfully.
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$76.52
SSB's use in long-distance telephone lines
Single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of signal modulation used to transmit information, such as an audio signal, by radio waves. SSB is a refinement of amplitude modulation (AM) that uses transmitter power and bandwidth more efficiently.
SSB was used over long-distance telephone lines as part of a technique known as frequency-division multiplexing (FDM). FDM was pioneered by telephone companies in the 1930s. With this technology, many simultaneous voice channels could be transmitted on a single physical circuit, for example, in L-carrier. With SSB, channels could be spaced only 4,000 Hz apart, while offering a speech bandwidth of nominally 300 Hz to 3,400 Hz.
The use of SSB in long-distance telephone lines provided several advantages. Firstly, SSB transmissions use amplifier energy more efficiently, resulting in longer-range transmission for the same power output. This made it suitable for long-distance communication. Additionally, SSB uses substantially less bandwidth than AM, requiring only one sideband and eliminating the need to transmit both sidebands and the carrier. This reduction in bandwidth leads to a decrease in power consumption, making SSB more energy-efficient than AM.
However, one trade-off with SSB compared to conventional double-sideband AM is the quality of the audio. The narrower bandwidth of SSB results in a reduction in the audio information carried by the signal, leading to audio that may sound thinner and less rich. Nevertheless, the audio quality of SSB is still intelligible and sufficient for weak-signal phone communications.
SSB has also found applications in marine radio communications, where it can send voice and data over long ranges, sometimes reaching several thousand miles under favourable atmospheric conditions. SSB is particularly useful for sailors and boaters embarking on extended cruises or crossing oceans, as it enables distress calls to be broadcast to every ship in range, enhancing safety during long-distance voyages.
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SSB's use in electric vehicles
In the context of electricity, SSB stands for single-sideband modulation. It is a technique used for transmitting voice channels over long distances. SSB allows for multiple voice channels to be transmitted simultaneously on a single physical circuit. This technology has been used in long-distance telephone lines and aircraft radio communications.
Now, onto the main topic of SSBs (solid-state batteries) and their use in electric vehicles (EVs). Solid-state batteries are a novel technology that offers higher energy density than conventional batteries. This is achieved by replacing the liquid electrolyte in traditional batteries with a solid electrolyte, which boosts energy density and enhances safety. Solid-state batteries can potentially address the issues associated with liquid lithium-ion batteries, such as flammability, limited voltage range, unstable solid-electrolyte interface, and poor cycling performance.
The advantages of solid-state batteries for electric vehicles are significant. Firstly, they store more energy, which is crucial for extending the range of electric vehicles. Secondly, SSBs charge faster, reducing the time needed for recharging EVs. Thirdly, they are safer than standard liquid lithium-ion batteries due to their reduced risk of thermal runaway and lower flammability. Solid electrolytes enable a broader range of operating temperatures, with SSBs capable of functioning at temperatures above 60 °C, compared to the range of −20 to 60 °C for traditional batteries.
The potential impact of SSBs on the EV market is immense. With major automotive and battery manufacturers investing heavily in SSB development, the market for these batteries is projected to expand significantly. Toyota, Volkswagen, Samsung, Hyundai, Ford, and BMW are among the companies actively involved in SSB research and implementation. The challenges lie in the high development costs and the difficulties in large-scale manufacturing with current technologies. However, advancements in additive manufacturing and 3D printing offer promising solutions to reduce production costs and scale up manufacturing.
In conclusion, SSBs have the potential to revolutionize the electric vehicle industry by offering improved energy storage, faster charging, and enhanced safety. With the growing demand for EVs and the increasing focus on energy efficiency and safety, SSBs are poised to play a pivotal role in the future of sustainable transportation.
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Frequently asked questions
SSB stands for Single SideBand, a system where the carrier and one of the sidebands are removed, allowing for a more efficient use of transmitter power to convey signal information, leading to improved range and intelligibility in radio communication.
SSB works by taking advantage of the fact that the entire original signal is encoded in each of the "sidebands". Since a good receiver can extract the complete original signal from either the upper or lower sideband, it is not essential to transmit both sidebands plus the carrier.
SSB is used for long-distance voice radio transmissions, especially in aircraft. It was also used over long-distance telephone lines as part of a technique known as frequency-division multiplexing (FDM).
An example of an SSB receiver is the Skywave SSB radio, which works well with the attached whip antenna. However, attaching a longer wire to the antenna can boost signal strength.
