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Frequency synchronization (receiver) (labview)

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In this module we implement a simple complex downconversion based on a predetermined frequency offset. The reason for complex (by way of complex exponential multiplication) is because we expect (in general) no conjugate symmetry for our incoming signal. Embedded is a tutorial video on the construction of the sub-VI, as well as an example video on how to use the function. The file is available for download below.

Input/outputs and help

Frequency Synchronization Inputs/Outputs and Help in LabVIEW
This is the LabVIEW help and block description for the Frequency Synchronization sub-VI.

The Frequency Synchronization sub-VI in the OFDM transmitter is shown above in Figure 1. The motivation behind this sub-VI arises because we assume in general we have a complex baseband OFDM symbol. As a result, any frequency offset from noncoherence up until this point must be corrected by a complex downconversion. Of course, maintaining coherence is crucial in preserving the orthogonality of the subcarriers and ultimately in distortionless recovery of the data.

Block diagram layout

Frequency Synchronization Layout Block Diagram in LabVIEW
This is the LabVIEW block diagram for the Frequency Synchronization sub-VI.

Figure 2 shows a LabVIEW implementation of this downconversion and is available for download below. The only potentially unseen function for the new LabVIEW user is the compound arithmetic function. This can be found in the numeric menu. Once placed in your VI, you must right-click the block and choose the arithmetic operation you desire (multiplication in our case). Note also that indexing is enabled for ease of implementation.

For all general questions, check out the instructional video below in Figure 3, the example use video below in Figure 4, or email the author for more information.

Instructional video

This is the instructional video for constructing the Frequency Synchronization sub-VI.

Example video

This is the example video for using the Frequency Synchronization sub-VI.

Download This LabVIEW sub-VI

Questions & Answers

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Lambiv
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appreciation
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In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
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AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
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What is different between quantity demand and demand?
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Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
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Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
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In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
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Answer
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c
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the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
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suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
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types of unemployment
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What is the difference between perfect competition and monopolistic competition?
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Source:  OpenStax, Fully configurable ofdm sdr transceiver in labview. OpenStax CNX. May 04, 2010 Download for free at http://cnx.org/content/col11182/1.6
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