# What does the following expression indicates?

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charu shree il 23 Giu 2023
Modificato: Vinayak Agrawal il 26 Giu 2023
In my research work I came across the following representation:
Let B(m) be the transmitted symbols, B(m){-1,1}, for m=1,2,...,1000.
My query is what does above statement indicates.
As per my understanding it is indicating that B(m) have values either -1 or 1 and in total the B will be a vector of dimension 1 X 1000.
Please comment if my understanding is correct and please let me know the mistake if my understanding is wrong.
Any help in this regard will be highly appreciated.
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### Risposta accettata

Vinayak Agrawal il 23 Giu 2023
Modificato: Vinayak Agrawal il 26 Giu 2023
Hi Charu,
Your understanding is correct. The given statement indicates that the transmitted symbols, denoted as B(m), take values of either -1 or 1. The range of m is from 1 to 1000, which implies that there are 1000 symbols in total.
Based on this information, you can infer that B(m) forms a vector of size 1x1000. Each element of the vector represents a transmitted symbol, and it can take the value of either -1 or 1.
To summarize, your understanding is accurate, and the vector B will have dimensions 1x1000, with each element representing a transmitted symbol that can be either -1 or 1.
Hope it helps Charu!
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Vinayak Agrawal il 23 Giu 2023
Without further information or constraints specified, the distribution of -1 and +1 values in the vector B can vary. It is possible to have an equal number of -1 and +1 values, but it is also possible to have an unequal distribution.
If there are no additional constraints or information provided regarding the distribution of -1 and +1 values, you cannot assume that the vector B will have an equal number of -1 and +1 values.
Hope it helps charu!
charu shree il 23 Giu 2023
Once again thank u so much ....

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